Well, after reading this entire thread, and with an upcoming trip to WDW for my 40th bday, I went out on eBay and purchased an assortment of pins for me and my kids (and Mom) to trade. More or less to have fun, pass time on line. We're not in it to make money and we're not hard core collectors.
So, I've won many auctions from more than a few sellers. Mostly, I've stuck to individual pins from a same seller. For example, bidding on a pin I really like, than bidding on a few others from the same person to save on shipping and build a trader group.
I guess that I don't want to be part of the problem and frankly, I don't think we'll have any problem trading scrappers for scrappers with CM (unknowingly), but I really don't want to trade with other guests that take this seriously.
Anyway, it seems to me that even if I look the pin up on pinpics, even if there's no scrapper warning, it could still be a scrapper, right?