That's nasty, but if he stayed in the game it wasn't illegal. What should WGT do about him?
But it may have gone against what's in the guidelines, depends on your interpretation I guess.
Our community is passionate about golf, and the spirit of competition thrives at WGT. No matter how passionate or competitive, however, players are expected to demonstrate sportsmanship at all times. Outbursts of temper and otherwise belligerent and disruptive behaviors are unacceptable.
Penalties for Breach
If a player disregards these guidelines or our Terms & Conditions, WGT may take disciplinary action against the offending player. Disciplinary actions may include prohibiting play for a limited time, disabling certain features, or permanent banning.