1) I would pick no company because the SV is not a homogeneous habitat. You have capital-intensive startups founded by PhD's trying to capitalize on 20 years of research... and you have startups bootstrapped out of lunchmoney by a couple of college dropouts who believe their new app will be a killer. Seriously, technology is more than the web.

2) generally speaking, imposing constraints can only decrease the maximum of the objective function one is trying to optimize; I did not say that such policies do hurt, I suggested it's not hard to see how they can hurt.