That's the point, isn't it?
If all around you are wearing masks, they are expelling far smaller quantities of 'nasties', so everyone is inhaling less 'nasties'. Work together as a team, protect your fellow Albion supporters.
Why would anyone not want to?
What kind of mask do you think that staff within an operating theatre wear?
What standard / grade of mask is considered accepatable (in the UK)?
How do you think these masks differ in their effectiveness from what you have observed people wearing at the Amex?
I thought that it was the mark of a 'real NSC'er' to get banned at least once?
If we ever get back to meeting up in pubs / at football grounds again and chatting about what it means to be a real Albion fan, I'm sure at least one person will state with absolute certainty that you are not a real...
I think you'll find that most tech savvy people won't be using anything with Apple stamped on it.
(Sorry, not helpful, I know - but couldn't resist :) )