I've tried it with one of my accounts: AsnnGirl and nothing has happend. Is it against weeworld rules? And, what happend to XxRazzaleDazzlexX ? o:"

No account has ever been closed for performing the background glitch, so it is assumed to be safe. WeeWorld likely does not punish users that perform this glitch since backgrounds are free anyway, and they are not losing any money as a result.

Technically, it is against the rules of WeeWorld, but has never been punished.

xxRazzleDazzlex never officially quit, although it's presumed that that's what happened.