Not so annoying that I would break off contact with them or anything, but annoying enough that I feel like screaming, just a little, every now and then. Obviously, this is not an exhaustive list.
Joining “1000000 STRONG AGAINST WORLD HUNGER” type Facebook groups and posting it all over my wall.
Reading a book about the struggles faced by poor people, and telling people how emotional it made you. (Context-dependent annoyance, obviously. This wouldn’t be annoying if you were telling me this to explain why you decided to give up your corporate law/investment banking job to work at a non-profit or even better, a more traditional charity.)
“Raising awareness of problems” without raising awareness of any practical solution. Especially if you can’t even explain the problem properly. (Oh, go ahead and guess what I’m talking about.)
Many types of political, religious, and philosophical arguments (clearly, not all of them). Particularly the ones that don’t even want to make a point. Especially with people who seem to have taken a vow to never, ever give logical reasons for anything they say. The most *headdesk* cases are where they blatantly state that a logical rebuttal is unnecessary, which of course applies mostly to religious arguments.
People who always, always speak in puns. Or cliches. Cliches I can accept if the people are nice enough, but the puns-or PJs, in most cases- can sometimes get a little overwhelming.
This post was drafted ages back, last October apparently, and I no longer recall what it was motivated by. I still agree with most of it, though.