Hall of Fame, possible now with camera phones...
Some leading contenders:
1. Guy who talks under the tapers microphones (extra points for spilling drinks on the recording gear). They set up a tapers section to let people tape, and then someone f**ks it all up.
2. People who do the mega-loud whistling. It is more painful than loud music ever is.
3. Cigarette at the hip dude(tte). If you smoke in a crowded room, put that ciggie up where everyone can see it.
4. Talking dude. Wow, talk through a whole show. I once went to Cracker at the club (when Eurotrash Girl was big) and the whole crowd was louder than the band. I left 1/2 way through because you couldn't enjoy it.
5. I-want-to-be-in-front-but-I-came-late-a$$hole. I think this is who Random Citizen is really pissed about. They force their way to the front where there is no room (often knocking people over) and try to push people out of the way to get all the way up. Often kicked out, sometimes successful, never loved.
6. I-am-backstage-and-I-will-be-in-everyone-who-is-working's-way. These people need to learn that this stuff is heavy and get the heck out of the way. They feel because they are allowed backstage we must bow to them and not get in "their" way even when trying to work. Extra points for asking questions while I am working.