No, I can't imagine a single cart attendant would appreciate the extra work. What I am trying to say is: yes a good portion of people probably do follow the rules, despite the possibility of not having any negative consequences but that doesn't mean we should get rid of the rules. There are people who "just want a haircut despite my cough, what could possibly happen" and will infect people along the way. Sure, they were considerate because they considered staying home but that barber needs the money. Maybe they think it is considerate, but I have a feeling a lot of other people won't.