Sheesh. Other people spoil everything. Tell us about the detective work you did to find out who did it!
Me, I agree with you: vandalism is never okeh, not even if they did it to you first. I prefer to take the high road and do a good turn for whoever might do something anti-social like thoughtlessly or maliciously damage my car: gasoline's costly these days, and there're always going to be really bad people who think nothing of stealing it from parked cars, so when my attention is drawn to a particular car (say, because I know
for a fact its owner damaged my car, orjust pulling examples outta the air hereits owner is a dillweed who routinely pulls in and takes his time parking at 2AM with the stereo blasting while people all around are trying to sleep) I go to the nearest auto parts store and buy 'em a nice, shiny new fuel cap. Then I install it for them.
How does this accomplish anything? Well, y'see, I buy 'em a
locking fuel cap, and I keep the key. It's time-release nuisance and expense for them; they won't discover the locking cap until they're almost out of fuel and probably somewhere well away from home. But (this is the key) I have not
damaged or vandalized their car.
Remember, kids, this falls into the category of things that are fun to think about, but never ever to actually do. Right? Right!