... well if you're doing what you can then there's no reason to feel guilty. Obviously there's a limit to what you can do (I don't think you should lower your standards just so you can donate (more), for example - unless you particularly want to), so the guilt ride only works if you're actually not doing anything, methinks. If you are, then it's just a sad reminder. If you're not, however, then guilt isn't any reason to do good - at least not a good one.
So, back to what I meant about "making you think":
Being aware of the issues around the world maybe makes you think a bit about them, maybe discuss them with your friends or whatever. And then maybe makes you want to do something to maybe change them a little. Make the world a better place and all that. And yes, you're right about one person not making a change but you've heard the counter-argument for that one so many times I really don't want to repeat it here. Look at it like this: was that vid (ok, yes, it's not about that particular flick anymore, but I guess it wasn't from the start either) seen by one person only?
Ok, dragging on a bit here, I'll rein myself in.