When people on WGT or anywhere else call out people as cheats it is always disturbing because even if they are proven not to be, the perception still stays in your mind. Sort of like the newspapers printing their retraction on the back page after they called someone a liar on the front page.
Defending yourself is always tough, because everyone expects you to say you aren't doing it sort of why the defendant doesn't usually testify in a murder trial, it is sort of expected of him that he will say he is not guilty.
Reminds me of the old Monty Python Flying Circle group in Quest for the Holy Grail. They accuse someone of being a witch and throw her in the river because everyone knows that a witch floats. The accused drowns and thus she was proved innocent, of course she is still dead but innocent none the less.
There are plenty of cheats on WGT, sandbaggers, multiaccounters, etc. WGT will eventually deal with them or the game will end up abandoned by the players.