the time + post count thing could work, along with the trader system., plus people could have a look at "posts from this user" and you might be able to get some idea if they were legit or not.. if they were really keen then theyll build up a whole fake profile and still do it.. but at least its more difficult and may catch out the stupid lazy ones or deter a fair few id hope anyways
does anyone know how "validated" thing work on the LS1 forums ? is that all approved by hand ?
a combination of this stuff would definatly deter a fair percent of dodgey scammers and at least introduce some form of screening