Perle: If you go to Farah's profile, you will see under the avatar a "Block User" button. If you block someone you will not receive any more private messages/mail from them. In the future if someone is bothering you it's best just to ignore and/or block them.
Farah: Please don't curse at other players in private messages. Also, it's up to players whether they want to declare a player challenge or not, even if they beat your challenge. That's their choice. Yeah it's fun if you can get in a back-and-forth with somebody where you keep beating each other, but not everybody wants to do that.
Some people are pretty casual and some people can get pretty competitive, but ultimately the reason we're all here is to play some games, it's supposed to be fun.