I see where you come from, but here's another perspective: what if someone wants to block .ml because of the instance bans, or because one of the admin is transphobic (https://lemmy.world/post/18236068)
That person can't access .ml communities anymore. There are a few alternatives around (!linux@programming.dev for !linux@lemmy.ml, !privacy@lemmy.dbzer0.com for !privacy@lemmy.ml etc.).
I agree that @cm0002@lemmy.world should probably stop crossposting posts from people who explicitly asked them to stop, but on the other hand most of the people probably don't mind (example of me asking someone who thought that nodoby needs permission to post a link somewhere else: https://lemmy.dbzer0.com/post/45767421/19161995)
@cm0002@lemmy.world, maybe just crosspost content from https://old.reddit.com/r/crows/ rather that !crows@lemmy.ml