These people are absolute trash of the earth and should be banned or at least prevented from creating self-moderated and locked threads, yet the moderators don't seem complacent in resolving the issue. They are taking real advertising space away from legitimate sellers as well as capital that could have been put to good use in the bitcoin network, but has instead been scammed away. Despite its decentralized ethos, if we want bitcoin to succeed as a currency, scammers should at least be filtered out of bitcointalk so as to not destroy the reputation of digital currency. Decentralization does not always result in the best outcome. While it may be optimal for a currency or distributed ledger of transactions, it isn't as good for marketplaces where scams such as these run rampant.
This place would be a whole lot better without the locked & self-moderated threads that breed a new generation of scammers.