I repeatedly get scam calls from a fake "Verizon" that show up on my caller ID as Verizon on my Verizon phone. When I call back I end up talking to the REAL Verizon who basically say "oh yeah that thing ... we'll never call you so don't pick up, that's a scam"
If they can't stop someone impersonating their own name/number on their own network, we're all screwed.
I KNOW for a first-person fact that Comcast periodically calls their broadband customers, at least their business customers, just to "check in and make sure you are happy," etc.
If they can't stop someone impersonating their own name/number on their own network, we're all screwed.