Feature request: Don't allow selected users to call me up

I was not able to find the following feature so I want to suggest this (all os):

As far as I know you can only enable/disable video call for all people.

It would be great if you were able to select users that are not be able to call you up. So that you won't receive a video or audio call and the selected users automatically receive a message like "You are not allowed to call this user" together with "audio only" or "video AND audio calls".

And if you were able to select audio-only calls or/and video calls for different persons (example: person A,B can make audio-only calls but person C can make also video calls).

But for example you can allow all participants to join a text chat (with/without attachments, voice messages,video messages).