I had one MM who was down right nasty the other day, actually insulting.I had sent them an item or two and waited almost 8 yrs, didn&;t get a response, so finally decided to give up.Sent one last item stating I was getting off.They finally sent an item that was rude, and then started using items to call me names, and kept on bombing me with insulting names and comments.And even blocking gifts from non-friends couldn&;t stop it.It was annoying, so in away I do wish there was a way to either leave MM once you join or block your MM on certain events.