I'm just venting, really. I know it's not going to make a real difference.
I suppose if you go waaaay back it was different, true. Back in the days of Usenet (as a discussion forum rather than as the piracy filesharing system it's mostly used for nowadays) there weren't these sorts of ToS on it and everything got freely archived in numerous different places because that's just how it was. It was the first Fediverse, I suppose.
The ironic thing is that kbin.social's ToS has no "ownership" stuff in it either. For now, at least, the new ActivityPub-based Fediverse is in the same position that Usenet was - I assume a lot of the other instances also don't bother with much of a ToS and the posts get shared around beyond any one instance's control anyway. So maybe this grumpy old-timer may get to see a bit of the good old days return, for a little while. That'll be nice.