Also in my experience, very few accounts that are sold end up scamming or trying to scam.
The best way to protect yourself from scams is to take the proper precautions, one of which would include using escrow when trading with the majority of users. It is recommended that a warning be listed in currency exchange to lower the number of scams that take place there. It is something very simple to do, would not involve changing any rules and would probably be very effective.
Old user know this escrow thing. But when newbie come to forum they don't know much about escrow.
Even I told them many times when trading newbie let's use escrow. They said your acc is hero and old enough to trust you.
Using escrow is time wasting according to newbie. Mostly newbie don't want to use escrow when trading with senior or hero acc, they happily send first to old account.