The only people I brake-check are the fags who come up behind me and do a really slow pass so that their front bumper comes only 2-3 feet from my rear bumper. I think it's some kind of ego statement......like "Ooooh I just passed you with inches to spare, ha ha I owned you."
I notice it's always guys under 30 y/o. Anyway, when I see them about to do that shit, I let off the gas so that there's engine braking, which forces them to go "oh shit" and jerk their wheel at the last second to get around me. Or I'll even pull the e-brake slightly.......Not enough for them to see I'm doing it, but enough for them to realize that maybe next time they should start passing someone a little earlier.