1. Yes
2. Yes
3. Yes
4. Yes - within limits. We wouldn't allow a KKK group, for instance
5. Social groups are an optional feature, just like photos and reviews. If you don't like or agree with them, simply don't use them.

Some people in a community join the local Kiwanis club, some don't. Some like knitting, others don't. A social club is just that -- a place where a like-minded group of people can hang out together that share some purpose or background.

I'd also point out that we have men-only and women-only forums, and people have learned to adapt to them and understand their value to each group. People have been asking me for this kind of functionality for years, so I'm happy to be able to finally provide it. Change is difficult, but that's why we're all given choices too -- we can choose whether to participate or become members of such groups or not.