Nails don’t work. Most of the time, the thires go right over them with no problem. What you need are caltrops.
People who don’t use their blinkers should either be shot or lose their license; I don’t which yet. It’s really the only thing that drives me mad in traffic. Oh, and the sons of b+tches who sniff my ass, because those m+therf+ck+rs put my kids at risk when I’m driving and I’m a bit picky about that.
Am I a bad person for checking out that link and wondering if they’re available mail-order?
The answer to both questions is yes. 
“Will stop dump trucks from dumping on your land!” Now there’s something I didn’t even know was a problem. But caltrops are the solution!
I owned a farm once…in Kansas…
But seriously, I owned an ex-farm, which I bought to build a house on. The job moved, I moved, my feelings moved, and it became a pretty piece of large rural property.
Which every worthless SOB with a truck and a will would try to use as a dump because they couldn’t afford the prices the plutocrats at the tip were charging (you know, like $10 a load…but it’s only those evil yuppies Republicans who can afford that much!!!1111!!!). In lieu of staking out a blind there and then shooting lots of holes in their crapped out Ford-100 when they showed up, caltrops would have been a nice, more legal “Second Place”…
That’s exactly what I think motivates this type of behaviour.
I think that certain macho types consider good manners to be a sign of weakness. And using a turn signal is of course good manners.
Yep, sounds like a Baltimoreon to me… 
NOBODY here uses signals. EVER. Bastards.
But, will they stop neighbours’ contractors from tearing the shit outta your yard?
I was just coming in here to comment on the ironies of my participation in this thread!
I have to disagree slightly. It’s not good manners, it’s for your own good! Letting someone else (in a 2000 pound missile) know what you’re going to do with your 2000 pound missile is just plain fucking common sense.
If they don’t, the tips in this book certainly will.
And my work here is done. Thank you and goodnight. 
Around here we don’t use turn signals ‘cause everybody knows where you’re going.
You’re way nicer than me. I’d kick the fender really hard. Probably break my toe in the process, but it would be satisfying nonetheless.
I once wasted a perfectly good, large Mac D’s shake on the windshield of an asshole that tried cutting me off while I was walking in the crosswalk with a green light.
Come to think of it, that was probably a nobler use of the shake than if I’d finished it…
My dad used to use his briefcase when he was getting cut off in crosswalks. A hard bang on the side of the car would work wonders without actually causing any damage.