Conversation so far:
Did Randy Quaid participate in theater?
In 2004, Randy Quaid appeared on stage undertaking the starring role of Frank in the world premiere of Sam Shepard's The God of Hell.
Did Randy Quaid participate in any other roles?
Randy Quaid has also starred in Sam Shepard's True West.
Was Randy Quaid successful in Sam Shepard's The God of Hell?
Randy Quaid's acting in The God of Hell was well-received and -reviewed by New York City's top theatre critics.
What else happened with Randy Quaid in theater besides starring in Sam Shepard shows?
In February 2008, a five-member hearing committee of Actors' Equity Association, the labor union representing American stage actors, banned Randy Quaid for life and fined him.

Question: why was he banned?
Self-contained rewrite: Why was Randy Quaid banned for life and fined by the Actors' Equity Association?