I mined at multiclone and a substantial number of my shares went to bitcoins-lc.
Hopping is mining in pools with a fresh block trying to catch short blocks and giving up when a block is taking longer than you want to solve. There nothing evil or wrong about it. Its no different than someone moving to another pool because it is taking forever to hit a block and no coins are being made. Is there a policy somewhere that says you have to stay in the pool for long blocks and you can't give up on them even if the pool is having bad luck? I haven't seen it. That's all hopping is, folks.
I'm 100% OK with a pool operator saying "We do not want pool hoppers here. We define pool hopping as X. If we detect X, we will close your account. I didn't see that. I certainly didn't see anything that said "and we also reserve the right to confiscate any of your earnings at any time".
If you can just confiscate earnings for any reason you want, what other reasons should we be concerned about?
I fully support your right to warn and ban users. Banning users without warning and imposing a 100% fine on earnings is hard to excuse.
I hope you will reconsider.