This is silly. You try to catch people who try to rip off / spam / scam.... etc. If anyone wants to do that, this wont stop them.
On the other hand this scr3ws up people like me who registered with only one reason. To buy used stuff. My other 19 comments im sorry, but probably will be spams only, to be able to respond to the ads in the "For sale" section. I also dont see the point how can I rip off people by buying stuff? I pay first and they send it with tracking, right? So whats the point making this to be classified. As PayPal have Purchase Protection this makes absolutely no sense in my opinion.
Someone could reply to me to have a conversation aroun this, maybe makes me to reply 3 times, so will have only 17 spams....