yeh a single user should only be able to make 1 clan per ladder. i know alot of people who hate getting a loss on there clan stats so with the rivals leaderboards it could become full of inactive clans with users creating mulitple clans. would be a great fix
No No No No DONT
add this UNLESS you make it an option that can be turned on or off.
JUST as many people most likely LIKE the fact that you can have mulitple teams/clans in one ladder. They already can't challenge each other anyway, why fix something that isn't broken? If your ladder is full of inactive clans then that means you should clean up your ladder, or your forum is dying.
I use the system for 2v2's, and often my clan likes to team up with more than one person to compete on ladders, and switch the teams up to compete against eachother. Forcing them to only create 1 clan would break that entire setup