My recommendation has nothing to do with censoring content of posters. Rather it has to do with organization and being able to keep track of a dialogue. One new thread per week would have thread starters paying more attention to whether or not their info needs a new thread or whether or not it could be mingled in a current thread. Quality of threads and the cohesiveness of same would lend itself well to readers and posters alike.
OK, but I just don't see Baron agreeing to spend the time/effort to revamp the forum software to allow one new thread per week per user on a trading website that is designed to attract folks based on activity (when said "activity" is judged on posts, threads, etc).
Much easier to just click "ignore" on problem posters.