Earlier quoted context omitted.
That flow was really scummy. I remember going through it. The entry point was an email claiming you have to "read and accept the updated policies in order to continue using the site". And the first thing you're presented with was that two-choice "Manage data settings" / "Accept and continue", implying for the user who is less than extremely careful that if you don't "Accept and continue", you won't be able to use the…
By staying at Facebook your friends are explicitly supporting these and other scummy actions. They have decided to hold their noses and prioritise themselves over humanity. Think less of them.
Edit: Also, that's not what "explicitly" means. I think you meant "implicitly".