Absolutely, but this can only happen if we refuse to run nonfree software on our machines. Even if the maintainers of a Linux distro decided to somehow implement some anti user feature like age attestation, it would be trivial to patch that out from the source or to remove it from a running system with root access. The real danger here is devices that are not fully owned by the user, such as iPhones.

And the overwhelming majority of anything running Android.