Of course I'm also boosted and got my flu shot (and do it every year), so I'm probably already more conscientious living in NYC than many.
If someone uses a fake to get in... well... there's only so much I can do, but I discourage it for their own health and for the health of others around them. I flat out told my friend who did the same as such.
I'm sure he'd get through it, but why get mega sick instead of getting the vaccine at this point?