basically, use only cash (no debit or credit cards ever), no housing purchase, live in a tent on public land, do not register for a driver's license, and don't have a passport. No internet account, so no bitcoin (which needs a steady internet connection) - crypto currencies are not the answer because they depend on you being online, and it's super easy to get caught in the mesh with the KYC (know your customer) laws.
You might be able to get by with paper bitcoin but no one really wants to take your offline coins.
don't get any traffic tickets or cross paths with police, always avoid anyone who looks like they are in some kind of authority capacity.
But for the average person who want to buy a phone, put it on a plan, and walk out - that is not possible without Equifax, Experian, etc providing an instant credit score.