Scammers are aware of this, and will often use a tactic of gradual escalation. At first, you have no reason to hang up and call them back, because the call seem

Scammers are aware of this, and will often use a tactic of gradual escalation. At first, you have no reason to hang up and call them back, because the call seems harmless. Good example would be someone claiming to be your ISP apologizing for recent slow internet speeds (when doesn't this happen), and wanting to confirm you're now happy and not experiencing slow speeds. Why would you doubt this and go to the trouble of calling back? The other problem is businesses being so extremely dumb. I've had and heard of man cases of Banks calling people, asking them verification questions on cold calls and offering no way to call them back. Not just stupid in that it limits your strategy, but it actually trains people to be more vulnerable to scammers.