I can only weigh in and say I find it mildly annoying when people radically change their Avatars, so a total name change is really over the top to me. I come to recognize people by their names and if someone wants to be MEMBER of the community they have to participate for a while. Someone who has had three names in a year may have been in the community for a year but they are not a MEMBER until they establish themseves in personality, contribution, and identity.