@mint @dcc @graf @splitshockvirus

> Object validator rejects activities of unknown type,

Object types and Activity types are different, but you can dig through the database for old posts and see people finding EmojiReactions federating before they existed. Maybe this has changed.

I had to clear some of them from the DB because they started breaking some scripts I used to detect bots. (This was admittedly brittle design, but I had hard-coded the activity types way back when; this was emergency code written to cope with the Gabpocalypse.) There were some remarks lain made about adding new ActivityPub verbs (something like "People think you can't add new ActivityPub verbs, but you really can.") and that line managed to stick with me but no information on whether there was an accompanying blog post or any elaboration remain in my head.