In an ideal world account sales just would be banned. However, I'm not sure how it would be enforced in all honesty. At the moment they are communicating through the forum, but if it gets banned then its just going to go to external sites. Maybe, that wouldn't be so bad? I guess then though account recoveries could be even more problematic than they are now.
Its already gone there, not only are these available in other "
forums", there are
websites intended for this purpose, so banning account sales is mere and beyond useless.