Repeating the question as you didn't really answer it, and as a minarchist I view ancap theories as infeasible even if interesting:

> Where, exactly, is anyone in the US "using violent police power to compel people to consume a pharmaceutical product"?

Your answer, as I read it, is "never, but they could, and that is concerning!"

I like Bill Burr's glorious response to the slippery slope argument, "Where does it stop? F#$@%#@%@ somewhere!"