> Instead of making something illegal, that might be perfectly acceptable for someone else, why don’t take a personal decision to stop using those services altogether?

Because there is no competition in the marketplace based on privacy, and if I want to use the services my friends/family/employer use, then I'm forced to give up my privacy.

The free market has never and will never solve a problem like this. The only thing that ever has is regulation and this is a textbook case of what regulation is for.