Yeah, I see the confusion here. It is complicated because we are mixing forum conventions with social media conventions.
In the short run, I think we can try and steer users more towards the category/tag actors. Not sure how far we can take it, but maybe there is a way to reflect that in this user’s profile somehow?
I don’t know how much flexibility the protocol gives us here, but if there was a way to block follows here but outline that the user has posted in actors A, B, C, it might help.