More clean up required...UU and UT are posting links (and only links) that are not motorcycle related (xxx related perhaps). Most likely bots, if I were you I'd clean up and zap' em from the user list.
Just to let you know...anything by ryokoware seems to be a cross post and it's taking up a load of disk space - he started about a zillion threads all under a different name -but all the same.