You have a cat. You give it water in glasses on the floor in lieu of bowls. You constantly have glasses of water of your own everywhere, like on the coffee table. Cat jumps up on the coffee table, which you also regularly allow, and while attempting to drink from your glass, knocks it over.
Is that the cat’s fault or yours?
Yours. How is the cat supposed to know not to do that, as it’s allowed to do all the parts of that and then didn’t meant to knock the glass over?
Scenario is irrelevant. It’s never the cat’s fault. They’re in charge. 
This is an argu-- I mean, “discussion” I’m having with my GF at the moment, as the cat just knocked over one of her glasses of water.
Since she will never take my word for it, I’m getting backup from the smartest people I know, but since they’re busy at the moment, I’m looking to you guys rimshot.
Definitely the human’s fault. Human now needs to drink her water from low, wide mouthed vessels like soup mugs and cereal bowls.
Or sippy cups.
The cat thinks it’s supposed to get its water from glasses. It saw a glass, and it tried to drink. Your fault for training it to get its water from a glass.
That was easy.
The cat has been conditioned to drink water out of drinking glasses, so it’s the human’s fault for teaching ultimately undesirable behavior to the car (by which I mean cat, of course).
At dinner my husband feeds our cat table scraps. Consequently, the cat bugs him and pulls at his pant leg during the whole meal, while leaving me alone. It drives my husband nuts- so he gives kitty a bit of food to make him stop. So the cat keeps bugging him. (The upside is that we’ve learned that our cat will eat the weirdest things. Whole wheat spaghetti noodles is the most recent bizarre thing he ate.)
Cats are not what you call bright creatures. To the cat, water in glass=water for cat to drink. They don’t really grasp the concept of “my water glass” / “your water glass”. It can’t be held responsible for something it doesn’t even have a concept for.
To my boy cat, water in glass = chew toy. He ain’t even that bright.
Cats are VERY quick about learning behaviors…if it’s a behavior that the cat wants to learn. If it’s a behavior that the human wants it to learn, not so much. Plus, of course, the cats are really the masters of Earth, if not the Universe.
My husband has also trained some of the cats to beg for food while he’s eating. The girls are constantly mooching bits of chicken or pork from him. One of the boys will occasionally want something, while the other boy usually doesn’t want any human food, except for tuna juice.
Cat does two behaviours that are not only allowed but encouraged - how could it possibly be cat’s fault?
We have the ongoing water glass battle in our house too - our solution is to put out a glass of water that’s strictly for kitties, and I use a cover on my own glass of water. If I forget to cover my water and there’s a cat head in it next time I look over, that’s all on me.
Nothing is ever the fault of the cat. I would think the cat had taught you that by now.
My cats drink out of glasses even though I yell at them not to and have never taught them to do so.
My cats do all kinds of “bad” things without my encouragement.
You can be mad all day with a cat, but it ain’t like you’re gonna get an apology. So might as well blame yourself for whatever they did. 'Cuz ultimately it IS your fault for having the cat in the first place.
Simple suggestion: The principle is that cats can have scraps but they eat after the humans. Put a bit on the side of the plate (or onto another plate in case you eat it by mistake) and feed it to the cats after you are done. All the people-food crazy cats I’ve had have learned to stop the hassling once they know that their share is reserved and wait patiently. Of course your husband and cats may vary and you’re in for some awkward mealtimes whilst retraining (husband and cat).
Edited to add: I knew someone who allowed her cat to thieve food off her plate while she was eating – never, never , never would I allow a cat of mine to get away with that.
You do realize that even though we all agree with you that you’re still wrong?
Naturally.
Even if it was the cat’s fault (which obviously it isn’t) - what can you do about it? Put the cat in Time-out? No TV or internet for a week? Reduced catnip rations?
When you come right down to it, fault is meaningless when it comes to a cat.
I blamed the cat just to be contrarian. I’m like the Ron Paul of this poll 
My cats drink out of people glasses all the time. I’ve taken to putting a piece of paper (like a note card) over the top of my glasses when I’m not watching them. It may not keep the cat out all the time, but if it’s knocked off of the glass it’s at least a warning that the water has probably been molested and needs to be replaced. I haven’t found any way to discourage the cats from drinking out of glasses. I can’t believe the OP actually trained their cat to do so! Why would you do that?
That’s my GF’s doing, not mine. When the cats drink out of her water she’ll just put it on the floor, and when they get low I refill them because they’re already dirtied.