okay narcotics cops already sometimes sell drugs to catch dealers, right? why don't they just make a DNM account, sell stuff for slightly below market value, and buyers would literally be giving them their address. sure they can't prove that it was the buyer themselves who ordered it, but that doesn't seem to matter when they do CD's right?
it seems like they could do that, have a warrant ready, and when the person picks up their package, kick in the door and search the place and they'd probably find tons of other stuff. if they did this enough, people would be too afraid to buy from new sellers. why don't they do this?
Basically, cops have to choose how to spend their limited resources, and unless there's some moral aspect (guns, toxins, fent, etc.) they see little advantage to chasing down a misdemeanor arrest. They want maximum payoffs and maximum seizures for their manhours, so they pick the biggest, stupidest, most obvious dealers they can find. Plus anybody selling anything particularly antisocial (poison, guns, CP, etc.) that involves actual physical harm. Cops love low hanging fruit.
Trust me, they're fully aware of all of us and I'm sure there's many who dream of a police state in which they had the untold billions of dollars and unlimited power it would take to chase us all down individually. But until then, it's way, way, way too much trouble, so they grudgingly ignore us personal buyers like the flies buzzing around their ears and settle for assraping idiots with shitty OPSEC who move thousands of dollars in hard drugs. Even that task keeps them quite busy all the time.
However, that could very easily change if the markets don't start taking a stand on fent and fent analogs. We're already all being tarred with that brush and they could very easily kick the whole TOR structure down (to the ringing cheers of the average square) if they decided to make it a moral issue about protecting kids and addicts from fent.