I hate it when people in public don't flush the toilet after using it. For some reason, I can't stand to have my piss comingling with the piss of others.
All TV commercials that try to associate their products with shit that has NOTHING to do with said product (associating beer with hot chicks for example; no one ever got the hottie by drinking enough beer).
Littering at the beach or on other public, natural lands (like in the woods). I know the average person has respect for little else but the two holes through which their food passes, but fuck people!
Angry people who are always looking for someone to listen to them complain (often self-righteously) about how this, that, or the other thing is all fucked up. For example, listening to people at work continually complaining about the same shit they can't change, or complete strangers that you strike up a conversation with and within 60 seconds they're latching on to the only thing you said that can be construed as even remotely negative.
Passive-aggressive people (no explanation necessary).
The Rev