With the best will in the world Admin can't really do much other than remove the offender which in some cases is detrimental to any case being built against the scammer
We do ask for members to fill in their profile before posting ads but its all down to good will which obviously is non existent if you're on the fiddle
We do also ask for 10 MEANINGFUL posts which is a rule being sorely tested by a few at the minute who are obviously here to use the classified section.
Suggest when buying if its not from a member with a decent track record do a bit of digging.For example how many posts they have in different sections and are their posts there to simply up their count