Yea, as soon as you get past security, no one cares. I was so bored walking around maskless that I had to try to get harassed! i went up to cops asking for direction and they just helpfully directed me.
At one point, I went into the store to buys stuff and a little non-binary koolaid hair asked me if I had a mask, I told xim "No, but I am wearing extra thick underwear." He laughed and dropped it.
face diapers were only mildly enforcd on 3 out of 4 flights. On the 4th flight, an extremely effeminate "male" was double masked, so I knew "he" would be trouble. Sure enough, "he" insisted that covering my nose wasn't enough, it had to be up to the bridge of my nose.
"You are one of the COVID cultists, aren't you?" I asked nicely. He didn't think it was nice.
Anyway, for the most part, even flying through JFK can be done with a strong degree of face diaper defiance.
i went through the airport in denver and boston... didn't bother with a mask outside of security and boarding. not a single word from a single person. not even the flight attendants.
in hindsight i probably could have gone through security without much noise.