I'm not certain he's pointing the finger solely at BTC Guild, and if he has a way to document that someone on the Guild is doing something like redirecting what equates to funds within the Guild, maybe it can be traced. Though I think it would be very difficult. Even if the funds generated were a wash, the question could be whether the offenders user account was freezable, or not.  Could other people have also been victimized? Yes, he could simply create new accounts and try again but would have to do so without the ill gotten funds generated so far. Is it possible to share a potential threat IP address within the inner circles of the Pool Operators? Could a security lesson be shared among users to help prevent security breaches? If the matter appears legitimate, can/would the Guild really do anything?