whitedragon wrote:
I support. It's kind of annoying to add the person on to your friends list and then take him off after only 2 minutes of talking so yes we do need it.
Yeah, it would be good for that. So many times someone adds me to ask for help, really annoying to add them. Especially when you forget to take them off the list and come across the name a few months later, and forget who they are. "Is he a friend or what?" So you don't want to remove them incase they were a friend. 
I've also not been able to locate one of my friends name after a pm from them, a few times, but it doesn't happen often. Though, I'd probably use this for all the PMs I'd send (if possible) if it were implemented into the game.
In my opinion its a nice idea!