@pfefferle @laurenshof I think the default WP comment also retains some information about the visitor who commented on the blog, so it should be no problem, right?
Or, to make everything easier, you have to make an announcement on the blog that if the visitor wants to comment, they must have an ActivityPub account. So you don't need to care about the visitor information at all
The only problem now is the old comments on the blog, it is the only thing that hinders me from installing to old blog