Not if it increases profits of hardcore account farmers due to them being the only people who sell accounts in the short term. Negatives mean nothing on some random newbie account.
I have no idea where you're getting this from, but this won't be the case.
Also in longer term you strengthen anonymous account farmers position and alienate hundreds of better quality members in 1 swoop.
Again, neither one hits. Exactly how would we strengthen the position of account farmers if we disallow account sales? This is contradictory. Quality members will be not affected at all. Unless you're talking about signatures, in that case neither one is true again. People which do not post solely due to being a signature campaign participants, will continue to post as nothing has happened.