Yes I did something good for a bad person and now I feel like shit
Discuss. Obviously being nice to homophobic Palestinians, or douchebag homeless people is cool but where do you draw the line based on how shitty a person is and how shitty their conditions are?
it's probably the best policy to help anybody who sincerely needs help - and that you're realistically capable of helping - without doing a bunch of moral calculus based on unknown variables. Nobody's a saint.
Just help folks. If they're shitty, maybe your not-shittiness will rub off on them. Their shittiness isn't your problem, morally speaking. But yours is.
I'm not saying go out of your way to do favors for the town Grand Wizard. If some of the variables in the moral calculus are in fact known, y'know, your helping resources may be better allocated elsewhere. But I think the above is a decent guide.