http://arstechnica.com/web/news/2010/10/how-to-use-abuse-and-leave-facebook-groups.ars
Facebook's new "Groups" feature is slowly making its way out to users, allowing people to set up group chats, document editing, and events for different aspects of their social lives. However, like most new features at Facebook, not everyone knows how to use (or avoid) Groups just yet. So here's a walkthrough on how to use Facebook Groups to your advantage... and how to get out of them if you decide you're not such a social person after all.
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