@thisismissem @clacke @navi
And that situation is very frequent in ActivityPub.

> Which is why a spec profile is SO important

Yeah, wouldn't disagree there but it's a *lot* of work, specially in implementations where it's haphazardly put together, like the transmogrifier in Pleroma, which is slowly getting deprecated in favor of a proper pipeline+validator.
By the way https://litepub.social/ was such a profile to describe a non-LinkedData profile of ActivityPub plus few other things but it never really went past WIP/Draft stage.