- Add a 24-hour timer before you can start creating threads on new accounts
- Allow only one thread per day to be created
And also: If you happen to stumble upon a troll thread - don't post in it. By posting in it you keep it alive and at the top of the thread list, which increases the risk of others stumbling upon it.
Simply click the "Report post" button on the bottom right hand side of the post and move along.