If you wanna call it allow list, I would call it subscribed for special hashtags.
But the meaning is more or less the same.
Also if a relay is on a server activated, an "unsubscribe all" would be good. Without blocking the complete user.
Even I do like tags.pub, I understand everyone who is unhappy about being pushed because of their server admin signed in.
Consent is important but also hard, if their admin decides differently.
I will write the FR in the next days