> Everyone will just ignore it. <
I’ll bet you a dollar the police won’t. Don’t wear a mask in a “required” area, and you’ll be having an interesting conversation with the local constabulary.
Depends. The federal police? No.
Most cops in cities are just trying to get by.
In that case, do like the "First Amendment auditors" do on Youtube. Ask them for their names and badge numbers. Demand that they cite the relevant law. Ask them if they carry body cams--and use your phone or a camera with video capability to film the encounter yourself. Threaten to sue them if they lay hands on you.