No, IMHO anyone should be able to buy and sell as many accounts as they want. Should it lead to spam, its for staff to handle and - if needed - ban the person with all accounts they hold. Someone that buys an account in order to ROI on it via signature campaign(s) has a high interest to avoid spam as it would destroy their investment (the account). Another point - originally brought up by Salty IIRC (sorry no ref) - is that open account sales and signature campaigns together make it more difficult for scammers to ROI on a bought account. Simplified the argument is: account sales are public thus people trust accounts less in general which lowers the amount that can be scammed w/o significant work (long cons); signature campaigns offer a legit way to ROI on a bought acct which increases demand and thus price for accounts raising the amount needed to scam to ROI nefariously.
I'm not sure if I understand correct, but it seems to me that in this statement you are saying that censure/mark spammers raises prices of Bitcointalk accounts.. It can be interesting tool...
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Yahoo62278 is playing with SMAS for personal interests.
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That might be true, but I dont see any evidence of this and I dont think SMAS has enough influence to make this profitable. Besides, due to its public nature anyone could verify and more importantly dispute being on that list.
Maybe you're right, and SMAS has very little meaning in the dealings, so we do not have to worry about.
But it is always good to talk - people can have own thoughts about that..