Ok, mine is pretty much something I should probably be arrested for. When someone is an asshole driver, cuts me off, flips me off, something, especially if older, smaller, or female, I get in the lane behind them and follow them for a few turns, until they become alarmed and then turn off. I've many times followed someone to their driveway and cussed them out from the road. Pretty much a road rage thing... I think it's pretty much illegal.