I really hope we never reach the point where someone implements a way to silence OTHER people from having an opinion about your post... You have every right to decide what you see, you have no right to decide what other people can see. If i want to see what people have to say about your comment, I should be able to, and you should be powerless to stop me.
Yea mastodon has that too, all services would let you delete it for yourself. But others viewing the thread can still see it,a s they should.
Only if you're admin probably