Blocking a person contacting you would be great for your profile (like Facebook)
I played with a person who all he wanted to do was make sexual remarks. He then follows up his tirade on my profile etc etc. Blocking him would be something I would request as there is no control atm over which idiots can contact the females in the game.
I would also suggest that a kick feature is added to the game where the host can select a player to kick and the rest vote on it, thereby a culmination of 3 votes to 1 would mean the offender for whatever reason is kicked from the game. This could also be counted in their profiles leading to them getting a bad name eventually