I don't know for sure. But I doubt that very many users have 0 posts. People can browse our site without joining with few restrictions. I'm guessing that most of them join simply to ask a question, and maybe a couple follow-up posts. But if they had a few posts say, 3 years ago & haven't been back since, their question and the answers still might be useful to more recent (or future) users. We don't want to lose that history. For all practical purposes, we don't delete ANYTHING from our MB. We have 135K threads, >1M posts, and about 250K images.