"There ought to be a law" is why we have nanny-state government. I imagine that is why there have been "no spitting" and "no chewing gum" laws on the books.
People going to lord it over others in the pursuit of what they think is proper.
Society is over-rated, once it gets beyond a certain size.
Along the same lines, I am currently starting my morning with blocking ranges of IP addresses to get Internet service back, due to someone's current desire to SYN Flood my webserver, which being hosted in my office, affects my office Internet.
It may soon come to a point where I choose to block all IP addresses except a few to get work done.
People gonna be people.
sigh.