I've been arguing something for awhile now that I think is relevant to this discussion. No BoA will not make bots go extinct, but that is not the goal in the first place. Similarly to something like network security there is no such thing as a 100% secure system. The name of the game is reduction and response. Reduce the ability to exploit, reduce the damage that can be done, and prepare your response against a threat as much as possible. With bots its much the same.
When trading accounts the seller has to worry about it's own expenses when considering a profit. Having to sell an entire account is more time consuming as well as inconvenient to the customer compared to them buying exactly what they want. They will have to pay for a bulk of different things. Some things they don't care about or want. Having to repurchase a new cd-key for each and every sale is quite harsh as that will really start to add up, and possibly causing a raise in the prices. Also, regardless of how well you think blizzard does policing their games, buying and using the actual account that used to bot is more risky to the player, especially as blizzard uses delayed ban wave tactics, and they are usually pretty large.
As for bot's that run with players, you are right. That will be more problematic then simply selling accounts. However, they are still not as bad as 3rd parties being able to sell items freely. Firstly, the customer would be paying for the CHANCE at getting loot, not simply whatever they want from a list. They could maybe get a good deal of items from running with them, but it may be nothing they want or need. This will eventually become worse overtime for the botters because people will start getting more geared later on and it will become harder to find upgrades for that customer. A higher and higher % of payed runs will become unhelpful to the user meaning they are paying money for nothing. Also, the items that the user does get will be bound to that user, and that user alone. They cannot trade them for other stuff, and not spread the disease to the rest of the population. Self contained.
Edited by Phantom#1450 on 11/15/2013 11:56 AM PST