No, random name changes remove the sense of identity from posters that is necessary to a serious forum. On a forum consisting entirely of trolls its fine, but this is not that place. Further, since name changes and avatar changes tend to involve inside jokes, they can tend to alienate new or outgroup posters, which is definitely not what this forum should be doing, imo.
I've been here for 4 years, I'm a regular and involved poster, and I am beginning to have a hard time keeping track of who is who, or even what inside joke is inciting name/avatar changes (the burqa thing?). What you get from this is cliques, and a social environment closed to all but a few.