So if I buy something and the seller tries to hit me up for an extra $20 for paying with Paypal and I refuse so they open a NPB and I get a strike because I refuse to be ripped off, you want to be able to block me FOREVER?

Up to you, I suppose, but don't complain about not getting any sales.

It wouldn't happen with me, anyway, I know how to get strikes rescinded, but a newbie would not be happy. In fact they'd probably not try to buy here at all. Good way to increase sales?

NPB cases take very little time and only cause aggravation if you allow them to.