Well I'm not so sure he was here for 30 days. He looks like a first time user based off of his history. Though he very well may have joined the site 30 days prior and decided to finally join a team.
https://cust22.myfootballnow.com/team/view/15
https://cust22.myfootballnow.com/forums/thread/1/229?page=1#250
https://cust22.myfootballnow.com/forums/thread/1/230?page=1#251
Perhaps requiring a user to have owned a team for 30 days will prevent these situations?