1. Banning the sale of accounts is no different than banning the sale of crack, guns or CP in the same subs. Those are already verboten in those subs, and the mods aren't dropping from exhaustion.
Selling of accounts would just move to places outside this forum. How would you want the mods to crack down in that case?
As I've mentioned above, I'd be happy if account dealing was done outside of the forum. This would make trading in bitcointalk accounts less frictionless, require more wits than simply making posts in the Digital Goods/Auctions subs, and thus less profitable.
Less profitable = less financial incentive. Take away financial incentive, and, as my rudimentary knowledge of economics suggests, will happen less.
Would also make it far less embarrassing to participate in this forum, because commentary like this just wouldn't happen:
http://s17.postimg.org/mph3uida7/Capture.pngDo I really need to explain why selling aged forum accounts is a bad thing, when new accounts are free to make?
Edit: You post:
...
You are a newbie with negative feedback.
Better try starting again in this forum with a new id.
Do you see how this "loan" would have had a much better chance of being secured, had the n00b bought himself a nice, reputable account with green trust?