If the autodialers were part of the phone company AND the makers of your phone, yeah throw away your phone would be sound advice. Yes, Facebook is that.
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.