You have a problem with autodiallers calling you to talk about auto insurances? Just throw away your phones, problem solved.
The keyword here is network effect.
Doesn't work though because there are lists of phone numbers and addresses that can be bought that still give you access. And if you're considered a customer, which is extremely loosely defined, they can call you.
Sure, it's far from as bad as it seems to be in the US but my personal threshold is 0.