Some value ethics and social implications of their doings more than compensation. I had passed interview at Facebook and didn't join, because it seemed like not a good idea to work on ads and manipulation of masses without clear alternative business plan that would actually also do good in the world.

I was looking for work, but Facebook is notoriously ageist. I wasn't going to waste my time going to an interview where I would certainly be eliminated because of my age.

To avoid going through the grueling day-long interview/whiteboard session, when it was obvious to everyone in the room that you weren't getting the job from the moment you walked in.

I’ve had FB bugging me off and on and I can’t get rid of them. If I were desperate and they were my only suitor I guess I would do what I had to, but I honestly have no desire to work for them.