OUCH!! You'd better reread some stuff cause that's not at all the case. Buyers that don't respond to UPI disputes can still leave whatever feedback they want. eBay will removed the big red Neg but the comment stays.
If a buyer has 3 different sellers close UPI disputes and give them the FVF then they will get NARU'd. The key is having sellers file FVF. So many for some dum reason do not. Too many of them feel that it's not worth it for a few pennies. That however is not the point. The point is to give them a UPI (Unpaid Item) strike!
You need to blanket this clown in a sea of red too!