I wonder if some that have it on in their car just don't want to touch it to take it off and put it back on. Or they're just idiots. Probably a mix of both skewing toward idiocy.
The question presented isn't something though that I've heard anyone say they'd do. Even the people I know that are all about some masks don't wear it constantly.
I wear one when going indoors where there are lots of people like the post office the other day. Other than that I don't wear one. I met a friend for lunch last week on the riverfront and we ate at a picnic table and we sat at opposite corners and had a good time. Tomorrow a friend is coming over to sit on my screened porch to social distance and have lunch.
Masks have a place for sure. I think it is stupid to wear one constantly. I think it is equally stupid to refuse to wear one regardless of the circumstance.