Well why are you allowed to make phone calls that appear to come from somewhere they don't come from? Furthermore, why do police feel obligated to respond to a

Well why are you allowed to make phone calls that appear to come from somewhere they don't come from? Furthermore, why do police feel obligated to respond to a phonecall that could be fake but not to a tweet, email, IM, etc? The system is broken, phones that can call cops should have strict provenance standards.