I'm in favour of face coverings and I've been wearing them since around the start of lockdown but I wish they had not been made mandatory because I could forsee exactly this sort of shit happening.
So many people have become utterly, irrationally fixated on masks as if they are the One True Thing that is going to solve this and keep us all safe. They're not. Face coverings can help reduce the risk of transmission in indoor situations where people are unable to stay 2 metres apart. They're a helpful extra tool, that's all.
Masks alone will not save us.
We have to do all the other stuff as well. The people who have picked their nose and not washed their hands, or who have been to several parties in the last week, or who have been shagging around, or who have symptoms and have not ordered a test, or who have been told to isolate by test and trace but have gone out anyway ... all those people are still able to go in the shop or get on the bus because you can't see those things.
I was on a thread a couple of days ago where the OP was asking whether it mattered if she didn't respond to T&T. It was a short, civilised thread with several posters explaining that yes, actually it did matter a lot, interspersed with others who said they would not comply. There was none of this shit.
We still haven't got the basics right - test and trace is a shitshow and there is very little support in place for people who need to isolate. Sorting those things out would make a far bigger difference than making people wear lanyards or visors or telling them to stay at home for the forseeable future, just because they are unable to wear a face covering.
You can't dump all the responsibility for preventing infection onto the small number of people who cannot wear a mask because this massively disproportionately affects disabled people and the detriment to them is huge.