Or, maybe input a button where the team can accept all scrimmage offers.
For the time being, talk smack to people in the forums and challenge them to a scrimmage to prove their meddle. Sounds kinda nuts, but I feel your pain on how hard to find an opponent, so just throwing an idea out there lol.
If you want flags though, nobody will accept USA, tooooo easy to get. They reject Japan half the time as well even!!! I send out 20 requests a week or so.....