These are the types of absolute morons that are actually running cities and states. They can't even put together how damn near legally impossible it would be to prove a case if they were to actually have this come to fruition. It would a monumentally huge waste of tax dollars for anyone to seriously attempt to litigate such a case.
The very first problem you would run into is actual data that irrefutably proves that all types of "masks" -- and the way people use them -- are demonstrably effective in the prevention of spreading or obtaining of the virus -- which is a nearly impossible task.
I don't doubt that when used correctly -- and that's key -- masks or covering are somewhat effective in reducing airborne particulates that may be present when engaging out in public, but I sincerely doubt extended, unwashed, repetitive use of any cloth covering would be particularly effective in preventing infection.