Comment by neilv

I know a lot of people who won't work for some companies for ethical reasons.

Though, sometimes the exact reason is muddied, since companies that are perceived as unethical in how they behave externally are often also perceived as unethical in how they behave towards employees. So you might object on pragmatic grounds of how you'd be treated, before you ever get to, say, altruistic grounds.

Also, sometimes fashion is involved. For example, many people wouldn't work for company X, because of popular ethical objections to what they do being in the news, but some of those people would probably work for an unknown company doing the same things, without thinking much about it.

But often it's just "I don't like what company Y is doing to people, and I wouldn't work on that, even if they treated employees really well, and it was really fashionable to work there".

(See, for example, the people who refused to work for Google after the end of Don't Be Evil honeymoon phase, even though they generally treated employees pretty well, and it was still fashionable to work there.)