One idea that #Threads does now we should learn from and directly steal: the ability to say in your settings that you can set @mentions to be from. You can choose to allow them from: Everyone, Profiles you follow, or No one.
That's a great feature. How feasible would that be inside #ActivtyPub?
@tchambers @smallcircles @liaizon @helge Every implementation would have to respect and handle that for it to be really useful