re: Would this tactic work to rid myself of endless spam calls?

Just never, ever answer a number you don't know. That's been my rule for a while now with the newest number I have. I rarely get spam calls now, maybe one a month. Once they know the number is good and someone will answer, they will flood it.

I have voicemail and text for a reason. If I don't answer and it is an important call they can leave a message.