Conversation so far:
What were Jack Thompson's thoughts about video games?
Jack Thompson has heavily criticized a number of video games and campaigned against their producers and distributors.
What did Jack Thompson critize about video games?
Jack Thompson's basic argument is that violent video games have repeatedly been used by teenagers as murder simulators to rehearse violent plans.

Question: How well did his campaign against video games do?
Self-contained rewrite: How well did Jack Thompson's campaign against video games do?