Yeah, the whole thing of “if #public is in to and the user is in cc, it means one thing, but if it’s the other way around, it means something different” just reeks of “IDK I just wanted to hack it up and move on and IDGAF how platforms other than Mastodon are going to wind up handling it.” Which is fine… as long as your users universally understand that that’s your level of care towards honoring non-public visibility settings they’re setting on their posts.