There's no city police department in the USA that has the manpower to try to follow around everybody who may be dangerous and has a restraining order, let alone do it successfully. For that matter, businesses almost never get restraining orders, they just tell the person not to re-enter the premises or they'll be arrested for trespassing. A lot of cases don'e even involve people who were actually fired, they just got bad evals or 'Feel' termination is in the cards yet to be dealt. Like I say, there just isn't a good way to handle the problem, somebody's rights get crumpled either way you go.