Of course this fantasy that confrontation would somehow make it all better isn't real either. I've gotten into a few confrontations recently and they rarely satisfy, you just get all angry yelling at the person, and they aren't apologetic or anything for being an ass, and you can't do anything about it, so you feel just as frustrated and the anger lingers just like if you did nothing.
The best thing to do, (as Thatcher recently wrote), is to immediately say something in a casual joking way, like when someone tries to cut in line, say "hey, nice try cutting there, I like your moxy, better luck next time" or I dunno, something better that someone less awkward than me would say.
Recently I've been often in the gloom about wanting to do something and not doing it. I don't think that doing it is actually any better, but you kind of have to just do it so that you can feel okay about yourself, and so you can be a person who does it. Is that vague enough?
I wish we could just cold-cock somebody who's being an ass the way that childish macho fantasy character on Californication does.