Conversation so far:
What were Thompson's thoughts about video games?
Thompson has heavily criticized a number of video games and campaigned against their producers and distributors.
What did he criticize about them?
His 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?