It kind of is the B&M's fault for breaking down coil packs for profit.
If I ran a B&M i'd not even sell single smok coils unless the buyer was going to install it right there in front of me and try it before leaving the store.
If smok had astronomical QC there'd still be at least one dud in 20.
I'm unsure if smok's QC is even close to that good with coils. .(more like a dud per pack?)
When you sell a sealed pack (how it was meant to be sold) of coils and there's a dud you can easily blame the manufacturer.
If you are taking them out of the pack and selling them separate just to make MORE profit then it would be you that hands the customer the bad coil.
I wonder how cool the FDA would be with vendors splitting coil packs down for sale?
I heard the cops kill people sometimes in NY for doing the same thing with packs of cigarettes.