It depends. Calls to our home number are just ignored if we do not recognize their number. But they do spoof numbers, which is a trick that deserves no respect no matter what they are pitching. Starting a sale with a lie (a phone number that belongs to a person or business I would answer) will bring out Nasty Tony. who will waste their time and sometimes get them so pissed off that they threaten me.
Eff them. They deserve it.