As a first step the admins here could ban the Newbies from posting anywhere except the Beginners section. And as far as the purchased accounts are considered, why can't we freeze accounts, whose location (i.e IP) suddenly changes from one country to another? For example, some guy in China is having an inactive Bitcointalk account, which he sells to BFL. The BFL guys (probably in the US) resume posting. But the IP address will change from China to US. Why can't we freeze such accounts. If you do this, then 90% of the BFL spam can be avoided.
Because a lot of people like me use a VPN to post.