My 2 cents worth.

If you look at Traditional, Longbow, and Female Traditional the rule states "No stabilizers or counter balances". The point to be made is that IBO destinguishes between a stabilizer and a counter balance. In the rules for RU the rule specifically addresses the stabilizer butmentions no restrictionsin regards to a counter balance.

Yes, if someone is ignorant to the difference between a stabilizer and a counter balance then they could pay their protest fee, which in regards to this rule would be better referred to as tuition fee.