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http://www.google.com/intl/en/+/policy/content.html is the list of terms and conditions for Google+. I have heard of a Nevada brothel that also had their G+ account suspended. Could be a content violation, but I don't know, since I've never seen the G+ page.

I would use a 301. Reason #1 - Some of those profiles are going to have external links, as Robert stated in his reply. Reason #2 - A 302 will not remove the URL from the index like a 301 will. Over time you could end up with many more temporary redirects than actual pages, which may look pretty bad. I prefer not to bloat the index with URLs like that. In the event that someone comes back you can remove the 301 redirect with no ill-effect. If it has been in place for a long time (e.g. a year or more) the profile page may not get its pagerank back from those older links, which would be fine. Please also keep in mind that Google can choose to treat a 301 like a 404 if the content doesn't match up. This could easily happen with the situation you mention above. However, I don't really think there is any other option other than doing the 302. I'd  rather let it be treated as a 404 than a 302 if we're talking about user-generated pages here because they can get out of hand and bloat the index over time. eCommerce sites that have products coming and going all the time have similar issues. Imagine if every product a store ever sold stayed indexed for years after the product was no longer available. Even if users are redirected I don't think this is an ideal situation.

And in terms of Links I would just let them came naturally, I will establish collaboration and if anyone links to my site or my content I will know that came absolutely natural a i will not have any problems with penguin or any update that Google will produce in the future. Actually I had one link to my homepage, which I got from a charity that I've contacted and ask them if I can support them by adding some info about them on my site, in return and without asking they added a link to my site