If you visit one of their fora (eg. https://epicmafia.com/forum/36 https://epicmafia.com/forum/36) and open your browser's console, the message displayed indica

If you visit one of their fora (eg. https://epicmafia.com/forum/36 https://epicmafia.com/forum/36) and open your browser's console, the message displayed indicates the kinds of troubles it sounds like those poor moderators have had to deal with (specifically addressing the "social engineering" part of your comment, I think). From a quick look at the source, it seems like the forum pages have the same fairly minimal markup as the rest of the site, which is slightly indicative of its being a custom forum app rather than something battle-tested (but I could be completely wrong, of course).