There may be more to what LL brought up but here is what I remember. TLG was on M4c and started gaining in popularity due to some good posts and class info. Grant started doing classes and one day he banned TLG and erased all of his posts from M4c.
Grant had the blessing of Larry Vickers as a LAV class instructor, and started doing classes. There was a bunch of drama that came out of that when Grant held a class that had safety issues. Someone posted about the issues, including some shoothouse violations that could have gone really bad. LAV took away Grant's credentials for a minute but then I think they were reinstated.