I think that, not only the Currency exchange section, but also in other boards involve trading of goods, like the Digital Goods board. Maybe you can start a poll, and I would definitely vote 'Yes'.
There are similar threads in the other marketplace subs where exactly two people will be part of a trade.
Till account buying/selling will not stop. People will not understand value for their account. They buy new senior acc for 0.2 BTC and scammed 0.5+ Btc in 1 day so it's very good profit for them.
When account buying selling will stop these kind of scam will reduce surely. Because everytime they need to start from newbie acc.
at least when accounts are sold, people will know that there is the possibility of a sold account and can research the value of such accounts when making the decision to possibly risk money on a person. If you "ban" the sale of accounts then the trading of such accounts will be moved underground which will give some people a false sense of security, and the people who know accounts are sold anyway will have more difficultly judging the value of an account so they won't know how much is too much to risk with someone.
I agree with the OP. There definitely need to be a sticky in currency exchange warning people they should use escrow.
A very large number of the scams originate in the currency exchange section and those scams are successful because escrow was not used.