Not necessarily wanting to start a whole thread, but just a heads-up for those interested:
There's a policy proposal to restrict the personal information that Wikipedia editors 12 and may reveal. Aside from other reasons, I guess this is designed to bring Wikipedia into something resembling compliance with the the spirit of the Children's Online Privacy Protection Act (COPPA) . It seems reasonably popular, but there are some editors dead-set against it, so I don't guess consensus is likely to be achieved, but anyway, it's an interesting issue.
Anyway, the page is here:
http://en.wikipedia.org/wiki/Wikipedia:Protecting_children%27s_privacy
A succinct digest of the arguments is here:
http://en.wikipedia.org/wiki/Wikipedia_talk:Protecting_children%27s_privacy#...