I'm not sure how effective it is in hindering gold sellers since they seem to have no problem contacting people via /tell, as evident by the spam I consistently start getting within a few minutes after signing on if I forget to use /busy

I'd rather see something in place such as being able to send email to anyone but limiting it to x emails per hour. I tried sending an email to a FC leader to ask some questions about their group and it took a minute or two, plus some Google searching, to realize I couldn't send the message. I also can't contact the person via the forum since we can't send forum PMs.

I think restricting communication to this degree makes the game feel more anti-social.