I believe that we should have to option to block someone from messaging you. I have gotten messages from someone that has not been very pleasant , and sense you can not ban someone for private messages that are hurtful or harassing then we should have that option.
I have reported this issue to your administrators and yet still nothing is done. I know it can be done, I have been on a game site before that gave me the option to block any one from messaging me or even see my profile . PLEASE take this matter into heavy consideration, I'm here to enjoy the game but can't if I have someone making it unpleasant for me .