I don’t pick up the phone unless it’s a known number. Everyone else can leave a message and I’ll get back to them, or not. We used to get between 6 and 10 cold calls a day. If you never answer the phone after a while the computers stop dialing your number. It takes a while but now we are down to an average of less than 1 a day.
I preach the gospel to them. Calls go away pretty fast.