I get way more phone calls like that than ones from people I might actually want to hear from and talk with.

I am so thankful for the caller-ID on my phone! I don't answer the phone unless I recognize the number and want to hear from whoever it is.

A lot of the spam calls even leave messages! I get one (or two) every day from some bunch that want to sell me "medical braces." Those come from different numbers all the time, so I can't just put a number for them on the "do not call" list.