I disagree. I believe the ethics of the people you work for are important, maybe even as important as fun technical challenges. Please do take your distaste or love for their business model wherever you like.
The idea behind choosing Apple, Faceboook, Twitter, Zynga etc. is to simply provide a filter for technical skills. Culture-fit, ethics and other flexible, qualitative criteria were not the target of this filter.
Although if you're prepared to make the sweeping accusation that no-one at Zynga is morally righteous enough to work with you, I won't stop you. That reflects on you, not them.
