Does Paxful have terms and conditions against scammers? if they have, why not report it to their support, they might be able to perhaps ban the user who tried to scam you,
They're unlikely to block users who try to scam, at least the victims aren't aware of such attempts before they are actually scammed and then report it. The weakness is in their chat system which I think isn't moderated at all, it's allow for scammers to ask you to do other things outside the paxfull trading procedures.