I just have to ask why does anyone care? If people are doing it to help a friend then fine, it's not hurting you. If they're not doing it for RMT purposes what should you care? Make note of those people and don't play with them. The only people it's hurting is themselves as they will have less experience with actually playing the game.

If it's for RMT purposes of course, ban the shit out of them. Otherwise just don't play with them and get on with your life.

I'd rather SE not change the game to try to "solve" this as it would generally inconvenience legitimate players.