Like my girlfriend says…all sausage is dicks and noses.
This is how I eat the rectangular pizza they serve in high school cafeterias. I don’t eat any other kind of pizza this way. The cafeteria stuff just kinda lends itself to that manner of eating. 
I just realised there is an eating habit that annoys me.
Eating a slice of pie or cake by hand. Cupcakes and snackcakes don’t apply.
It’s amazing how food-related topics seem to cause more strife, rancor, insulting, name-calling, judgmentalness (is that a word?) and outright hostility on these boards than religion, politics and bare feet combined.
Why is letting people eat what they please not an option?
FTR, I like ketchup – on lots of things.
I don’t much mind how people eat, provided that they do so quietly and chew with their mouths closed.
Ketchup is sweet, sour and salty all at the same time, all base flavours. Which means it overwhelms the flavour of all but the most robust foods and everything you put it on ends up tasting like ketchup. More sophisticated sauces are not designed to be strongly flavoured and are designed to compliment the taste of the food.
One minor pet peeve is restaurants where they serve your food and then immediately ask if you want some pepper on it. I usually like a chance to taste my food before I can decide if it’s under peppered and I usually like to spend some time looking at the food before figuring out how to eat it so the pepper thing means I either force the server to wait or I end up with over/under peppered food.
Actually, the reason why salad used to be served later was because vinegar can often ruin the taste of wine so salads would only be served after much of the wine had been consumed. The more modern trend of increasing the oil to vinegar ratio in vinagrettes and using lemon juice or verjus instead of vinegar means that it is now acceptable to serve salads before the main course. Salad more properly belongs before the main since contrast enlivens the palate and prevents fatigure. With the standard soup, salad, main, dessert sequence, you get alternating hot and cold dishes, alternating savoury, sour , savoury and sweet dishs and alternating textures. A small sorbet is often used to cleanse the palate before dessert.
VINCENT: But you know what they put on french fries in Holland instead of ketchup?
JULES: What?
VINCENT: Mayonnaise.
JULES: Goddamn!
VINCENT: I seen ‘em do it. And I don’t mean a little bit on the side of the plate, they f**kin’ drown 'em in it.
JULES: Uuccch!
Courtesy: Pulp Fiction (duh)
Ketchup on french fries. Jesus.
Cheddar cheese is the proper sauce for fries.
I guess I would get bothered if someone picked up their lobster and ate it like Daryl Hannah in Splash, but someone putting catsup on their prime rib wouldn’t bother me (although I’d think it were a waste). Eat your pizza by folding, with a knife and fork, New York style, Chicago style, any other style… don’t make a difference to me.
The only kind of “eating food the wrong way” I can’t abide is when someone inserts food in his rectum and excretes it through his mouth. That drives me nuts.
Well, Shalmanese, that’s the big problem with etiquette – too many authorities and a lot of confusion about the history of this rule and that. The book I consulted for my first post said that salad was to cleanse the palate before the main course. At least one of my other books (I have 16 general etiquette books and I didn’t check them all), used your explanation (that the salad dressing will spoil the taste of the wine) instead. But all 16 books agreed (as do many online sources, including the second link posted by Phèdre nó Delaunay) that, in classic formal service, the salad course follows the main course.
It’s also true that there is no bread served in classic formal dinner service. I knew this, but forgot it when I wrote my first post. I’m fighting a sinus infection, so maybe that’s to blame for my forgetfulness. Or maybe I have a mental block against that rule (I like bread!). Anyway, it’s true – no bread at a formal dinner. Given that, I’m changing my advice to Batsinma Belfry for next time she eats with her prick of a brother-in-law. Instead of the dailogue I provided previously, she should say (when he bitches at her for cutting her bread), “I’m eating this informally. If you ever take me to a formal place I won’t cut my bread, of course!” When he protests that it is a formal place, she can say, gently, “Oh no! At a formal dinner the salad course comes after the main course and bread is never served.”
BTW, BB, this Christmas, you ought to send him a general etiquette book. Write in the flyleaf “For my dear brother-in-law, because he is so interested in good manners.” Find a nice bookmark and stick it between the pages outlining how rude it is to correct a guest.
Rude bastard.
And I’m rude too – I keep forgetting to answer the actual OP.
I don’t mind how or what anybody else eats – unless they are really eating messily. I would notice if someone talked with their mouth full, for instance, or crammed a whole biscuit in there, or picked their plate up and licked it. I wouldn’t say anything to them (unless they were my child or something), but I would notice.
But a little thing like cutting your bread, or holding your fork in a way that’s out of the norm? Those things I wouldn’t even notice, probably.
Same with eating weird stuff – jelly in your mashed potatoes, or ketchup on your prime rib. I might notice these things, but they wouldn’t bother me. And I certainly would never say anything about it. What other people eat is none of my business – unless they are trying to eat my arm or something (with or without ketchup).
I’m not a huge french fry fan, but when I do eat them, I do so with mayonnaise. Ketchup is just too…ketchupy.
I’d uuuuch too eating fries with Hellmann’s right out of the jar. (And I was raised eating Hellmann’s on everything.) What you want is aïoli, basically mayo + garlic (although it’s an art form in itself).
I’ve never been able to do this. The fish always falls off in the soy sauce instead of staying on the rice. This is especially true if I’m using chopsticks instead of my fingers to hold the sushi.
I’m very uncoordinated, but I have absolutely no idea how anyone ever manages to do this. 
Eh, I hardly use soy sauce any more. The sushi itself is yummy enough. Hmm. Sushi.
What really gets to me is people who cut spaghetti. That’s horrible. Whether I will say something to the offending person depends on who they are and the situation but even if I don’t I’ll be biting my tongue.
I went with my sisters to a Korean BBQ restuarant, and since none of us had ever been there before, when they served the 20 small dishes of (what we later found out were condiments :smack: at the begining with lettuce leaves, we took portions from each bowl, wrapped it in a lettuce leaf and ate it. We were almost finished with this when the waitress brought the fire and meat. She never said anything.
I think it would be like a Korean family going into the Denny’s and sitting there eating all the ketchup, mustard, sugar packets, and salt n pepper shakers while waiting for their meal.
We (sort of) realized our mistake then.
Another thing I realized is how pungent your skin can smell after eating 20 bowls of condiments.