I was on the Nerdfighter reddit earlier, when I came across a disturbing video:
Please, watch the whole thing.
It's about a war criminal named Joseph Kony, who's... well, just horrible. And the organization who made the video are going to try to stop him, this year.
I don't think it's hard to make the case that this would be a really good thing, and I'm definitely excited about the possibility for doing real good this video implies. On the other hand, I'm apprehensive about this sort of activism -- you don't have to look far to find examples of humanitarian efforts in Africa backfiring horribly.
That said, my initial research (Wikipedia) strongly indicates that, yes, Kony is as bad as the video makes him out to be. I'm going to do some more research, which I will do my best to summarize here, and unless I find compelling reason not to, I really want to get involved.