It has been common knowledge on WGT that cheat programs exist and some players use them since early 2011. One of the said cheats publically hung himself by posting a screenshot of his card and the cheat engine icon could be seen running on his taskbar.
Now unfortunately all cheats aren't as stupid as Shommy was back then so the only way that suspicion can be created is via low scoring. This means the best players that are clean will always have the finger of doubt pointed at them unfairly.
It's clear that WGT have not the manpower nor the desire to actively search and destroy these saddos so there is little that can be done to cure the problem without help from the WGT community. I know that questions have been raised of certain players privately to WGT and certain players are no longer with us as a result. The system aint perfect but it's the best one there is right now.
Innocent until proven otherwise, it's all too easy to go on a witch hunt driven by the green monster inside all of us.