I guess the real question is what developers/publishers do you support or not support.

Personally, I support Square Enix because they make good games and as far as I am aware have no major bad press.

I don't actively boycott any developer I can think of. I tend to judge them by their games more than by their senior management, but I do pay attention to things like buying out exciting indie companies to leave them doing work on their AAA titles (eg. Valve acquiring Campo Santo and putting them to work on Half-Life), Blizzard/Activision's many issues at present, and tendencies by certain companies to oversell their games through various methods (for me this applies to Pokémon, Sims, etc).