Yes.

If one lives in the US and feels strongly about it, they should file an Out-of-Hospital DNR and POLST with every local hospital. Also consider wearing or carrying official bracelets/necklaces (varies state to state).

I'm neither a lawyer nor a doctor. :)

There was a "culture war" (the rightwing government intervening due to religious reasons) in the 2000's involving a "DNR"-esque case https://en.wikipedia.org/wiki/Terri_Schiavo_case

Yes