Server protection?
 

Since you can't ban/jail players with trial accounts, you should fix that! @_@; Would it work if the ban/jail info was held on the server instead of on the players account? I dunno what im talking about, all i know is that I want to be able to ban trial players.

You can ban trial accounts. So instead of jailing them, resort to banning. Whatever you do is up to you.:o