That’s actually a good idea! But, are there enough people here on BLF that have analyzing chargers AND a few extra bucks floating around to buy known bad cells AND the inclination to do what you’re talking about to put someone out of business?
Technology By Rewrapping
I have lost confidence in TinyDeal after receiving this deal via email.
http://www.tinydeal.com/2pcs-5000mah-37v-18650-rechargeable-batteries-–-blue-p-120700.html
Not as bad as the Ebay batteries, but total BS.
I would hope so, but i would also assume because you where the only one to respond to the idea that maybe no 
I have just ordered a opus less than a week ago, but yes i personally would have no moral issues with removing some scammer sellers from ebay. But the tricky thing is, one guy can’t do it because i you start buying lots and lots of items and and start to opening a lot of disputes, your ebay & paypal account could get in trouble, because they will just assume you are the scammer who only want free items from the sellers at ebay.
So that is why there have to be lots of people doing it but individually slowly, mixing in some scammer cells knowingly from scammer sellers who are endangering thousands by there shoddy products unimpeded. While mixing in the buys with your normal ebay buys to not arise suspicion. But still slowly eating away at the scammer with bad feedback ratings and well proven disputes.
That’s a lot of work just to protect some unknowing buyer. There will always be scammers. Take one down, another two show up, with a new account and a bunch of others to give positive feedback.
If one is going to invest time and energy in making the world a better place I think there are better things to do than take on a battle with these people.
many who dont know any better.
every vape,flashlight,rc,ect forum should have a bright,bold warning about these dangerous junk batteries.even include it in any welcome email.
the buy,test,neg approach wont work as these sellers are high volume and the negs get buried fast.