Does anybody use them? We have two guys in our kitchen with beards. Should they be wearing nets? Or do people in real kitchens just not do that?
You see them in food manufacturing, many butcher shops, and most institutional food service establishments, but they haven't found their way into the restaurant world, in any major way. There may be some municipalities that require them, but I expect more and more health departments will start requiring them.
If kitchens around here started requiring a beard net I'd have to quit and find a respectable job!