This wasn't my idea but I think it is a good one.
You could use it for clan friends, real life friends, and you could have automatic-friend-list on and save friends to a default folder you could use for tournaments.
This is what I think it should look like: (I hid the names.)
And this is what the tournament invite list should look like: (Also I hid the names.)
Edited 3/9/2014 13:07:52