I think you'll find it's a tad more than 12. I expanded the feedback to 200 feedback per page and counted around 67 false positives on the first page. That's one seriously messed up buyer. Sadly, only a small portion of those would have opened a non payer dispute.

Hopefully at least 2 of those sellers opened and closed a dispute, so none of us here need to worry about her try to buy or bid on our stuff.