Do not auto-activate groups automatically on joining. This can lead to embarrassment when in company, suggesting to someone you are reading their profile, or you join a group that you would rather not reveal to that gathering of friends. I know that group titles can be hidden, but to have to turn that on and off each time I want to join a group is tedious, when the server could just not auto-activate newly joined groups. This auto-activation serves little purpose after someone joins their first group, which usually happens on Orientation Island.