Blacklist would be a really good idea. I once got pm from someone not long after I first started playing saying stuff like they were a 14 y/o girl wanting to cyber and blah blah. Really sick shit, I ofc didn't reply back and haven't seen them since that one time, but if I got a pm like that then I'm sure that I wasn't the only one. Plus some people I just don't care to waste my time seeing the comments they post. So +1 to blacklist.