The members getting scammed out of this are inexperienced buyer. Anyone with some online buying experience has knowledge about genuine Escrow websites. Though, I must say that even after taking all precautions there are chances of getting scammed with an online purchase.
This forum does not offer any protection for deals happening here and this will be impractical also. Various other internet marketing forums, require user to meet certain requirements and then pay some fees to get their sales thread listed. Thereafter, the service is reviewed by staff and then approved for other members. Also, if someone scam there, it can be reported to moderators and they ban the seller if he is at fault.