Could be immuno-compromised. Or something else.
My whole family is under the domestic surveillance due to a mix of academic ability and my involvement in politics, as detailed in my tag. My surveillance camera at the end of my driveway actually has the kid next door talking to another surveillance kid about them following me around from store to store. Those kids are being run in the schools too, it is unbelievable what is going on that nobody has any idea of.
So anyway, I have a relative who wears the mask to screw with them to prevent their surveillance from getting imagery of them when they go out. They think they get bonus points for photos or transcripts or other info they gather, so they view it as some form of resistance against traitors to the country. They are about as conservative and antiestablishment as they come.
Could be a lot of things, and the person might not be an enemy just because of the mask.
Interesting website. I’ll have to check it out more when I am not so fried from work.