The information didn't help, as crashing because of auth doesn't happen to anyone else (they would have posted about it already), you still revived. You need to post a log o when it happened when the person joined and auth failed.
By "joining and leaving at a constant rate", I didn't mean joining and leaving every 6 seconds, I meant leaving and joining at...a constant rate, but I don't mean leaving and joining fast and stuff. After Joining and leaving enough servers, over a period of 30 minutes to an hour, auth won't work. Also, I can't f'ing remember the whole word for auth (how it's spelled) and I don't know why. Please help :(