Kinda like HIPPA medical privacy rights in the USA: when you go to a doctor, they'll hand you a paper for you to sign acknowledging you understand your privacy rights...then they hand you another paper for you to sign away those rights; if you don't sign both, you don't get any medical service. Imagine a not-distant future where if you don't opt-in to questionable services from Google, Apple & Microsoft, you're flatly denied use of any of their products - digitally ostracizing yourself from most of society.