@mcg It's more than that, most of them are account deletion messages from accounts that I've never seen before
@aaronpk To ensure the posts are deleted, mastodon sends the Delete activities to all known servers regardless of follower relationships!
@dansup I don't see why it makes any sense to notify my instance about things that my instance has never been notified about before. That goes for both posts as well as accounts.
I'm seeing that a lot as well on my instance. It makes sense in a way. Our instances could have done a look up for actors and/or posts and stored that information, for whatever reason.
What bothers me more, is that there are federated platforms out there (Fediverse.blog for instance) that just send out any post to my instance, while I'm not following anyone from that platform at all.