This is the problem, and has been explained ad nauseam in other threads since the IRS rule change was announced. This is a hobby, not a bookkeeping exercise for many of us. Also, it all smacks of "If it please the King, might I be allowed to sell an item I paid for? What? I must then prove that I didn't make a profit, or if I did*, then I will owe the King a portion of it, that he might send it to far away lands to aid in foreign pursuits that do not enrich us or provide for us? Excellent, I'll inform my vassals at once!".
The scammers are here because people are leaving their email addresses, or worse, using that email address and a very weak password to their account (and not using 2FI), and just not doing some due diligence to protect themselves or god forbid, take even a moment to request some confirming indicators that the person on the other end of the email is the correct person. An awful lot of people have been up in arms in the past couple of months over the use of PPFF, but the thing is, it's not the issue, it's just a symptom. You can scam people using virtually any form of payment, and it's happened here in the past.
As some of the Admins have stated, a lot of this would be entirely circumvented if people would purchase even a basic membership and utilize the PM capability, but even that has been derided by some of these non-paying members here.
So, for a lot of folks, the easiest thing has been to just stop selling knives (which is why so many few sales threads lately have been from longtime, high post count/participation members). I honestly think it'd be hilarious if Spark outright banned PPFF use (though it would most likely continue in PMs), and we watched participation drop significantly on the Exchange. Not everyone here likes spreadsheets or keeping track of receipts, and the outrage from those folks receiving a 1099 would most likely cause a further drop in participation. But hey! As I've already stated: there'd be fewer scammers, which is the big win, right? That, and all of the moral outrage puffery against people defrauding Paypal and the IRS could be turned to other things. It would be great.
* A rare occurrence for a lot of sales here