This is not something new, and I don't really see the problem. I mean, everybody can get pissed in a situation, no matter if it's a game or not, and those in-game mails should not be taken seriously. Come on, who has ever belived that anybody is going to beat eachother up in RL beacause of PA?
Big alliances and friends of them have always liked (Or at least, some of their members have
) to send things like this around. All the rounds i've played so far, I've gotten at least one. So what? Send one back!