Pulling over for flashing lights and sirens is one thing. But building a bridge out of the way of your own infrastructure with your own/investor capital so onl

Pulling over for flashing lights and sirens is one thing. But building a bridge out of the way of your own infrastructure with your own/investor capital so only flashing lights and sirens can cross it is another (god forbid the other parties involved use the same bridge). Why don't law enforcement agencies build their own social networks and email clients that people want to use?