@Fairygodmother
I am tempted to think that we are much less likely to see people with genuine exemption needs than you might think.
After all, their exemption needs are very likely to make them more vulnerable (asthma, breathing issues, etc) so I would expect them to be even more reluctant to go into enclosed spaces if they can avoid them. Obviously that doesn't cover all the exempt, but still a fair proportion of them.
I'm in an interesting position at the mo, since I am using a cute little mobility scooter on account of knee problems.
Me, a mask and a mobility scooter = ppl treating me with a generous social distancing personal space
Me, no mask and a mobility scooter = ppl looming over me and completely ignoring any social distancing
It is a marked contrast.
What is even more interesting is that my knee problems have absolutely zero impact on my Covid vulnerability - unless you count the high inflammation levels. Yet ppl seem to need visual signals (mask/scooter) in order suspect vulnerability. I could shake them, honestly. Vulnerability is not visual. Assuming that anyone is vulnerable based on age or fitness or whether they have a scooter is absurd. Yet over and over again I see ppl reacting to the visual cues. Which basically means they do not understand why they are being asked to socially distance and wear masks...