How could we enhance security?
Pay more commission per transaction and security will get tougher. There also can be some insurance layers added per transaction as well. Lots of different ways of monetary control.
Enhancing security is best when done at your end, not PayPal.
Scamming customer claims $1800 back? Guess what? In my case $1800 are gone to another paypal account and than to generic prepaid card account and than in my pocket forever. PayPal sets my account to negative, but I don't mind -- LET IT BE... Speaking words of wisdom LET IT BE... Have another account handy to receive funds or will make one -- doesn't take much to clone.