Thanks for those links, and I have had a quick look. My idea was for a small discussion club, initially for low cost cryptos with potential. I have set up a basic framework on my economic survival site - http://wiseaccountant.com/survival/

Most of the threads are on closed boards, but I did set up a few public ones to help members sell products and trade with non-members. It needs to stay as a small closed community to avoid the shit storms you mentioned. I know that reduces the profitability of the site, but it keeps life fun, rather than becoming a work chore.