@Balthazar: Are you making sure that those miners who have withdrawn too much (and stole the LTCs from the pool) that day, are
not being paid here? I'd asked you this before, but I could not find your answer yet. The above list includes some of the 68 users who withdrew too much; so is it possible that you double check please? Thank you.

I seen your message, and thought about some time. It has a sense, but the refusing of payments for this accounts would be ineffective measure.
Just because this guys able to mine using another accounts. The most of this users has dynamic IPs or sitting under NAT, so we couldn't use IP addresses to identify them.