They can pick your soda bottle out of the trash and swab the rim (any number of things/ways) and they’ll have your DNA. DNA actually much easier to get (without consent) than any other identifier.
Anyway, they can use tactics like this to construct a rigid caste system. They can check your identifiers against your NSA political profile. Being a Medicaid provider is only for the enlightened high party loyalist.
In North Korea they call it the Sungbun system, your defined as a member of one of three castes: “the loyal”, “the wavering” or “the hostile”.
What the rank and file Democrats don’t understand is that their reputation will not survive what’s coming and people they know may well see to. Too bad, soo sad.
They can do, like you say, as they want. But I watch my trash. I also spray it with WalMart’s undiluted Louisiana Pete’s Hotsauce to keep the ‘bears’ out of my trash. :o)