Sometimes, I comment on a post, only to see the entire post deleted, presumably by the post’s author as there’s nothing in the modlog. I suspect a lot of users find that behavior annoying. But then afterwards, all information on the post seems to be hidden, as if it never existed.
Ideally, I’d like to at least be able to interact with something on the post to block the author or report the behavior to the mods. But even just having the post author’s username would allow me to block them.