I think the only problem it causes in the database is that if there are a lot of them then you have to go in and clean things up more often. I don't see how more posts in one thread would actually screw up the database. It just doesn't make any sense...but then again it is a computer...but then again we never had problems in the past...except for that one word association thread that got to 1000 posts...but that was also a month or less after I joined the site and I am problably the one who remembers it.