Honestly, I kind of like the atmosphere the site has considering this is a support site. The rule make sense IMHO, as there are already a lot of sites out there based off the sexualization of our fetish/lifestyle/whatever you call it. Seeing some of the garbage that goes on on those sites, and its nice to have a place where it is safe to discuss things with out having to flee from creepers, unwanted advances, and sexual content.
The other concern, without speaking for Moo and staff, is unwanted legal issues that can arise with that type of content. In light of the new laws around online sexual exploitation, I could see why it wouldn't be changed. Before, it could of been hosting issues. A lot of hosting services actually have policies against hosting adult content.