I completely agree with your position. I have turned down solicitations from both organizations you listed for exactly the same reasons. Working for any entity that engages in any sort of behavior that involves compromising user experience or privacy simply for sake of profit is not something I can consider at this time. I understand situations arise that are not profit-motivated which can't be avoided (federal investigations, service outages), but it is clear in the case of Facebook and Google what is going on. Compromising user privacy and interactions is their principal means of doing business.