I mean just to play the devils advocate. None of the NIPs are enforceable, so even if nip-09 exists, there's really NOTHING you can do about a relay that doesn't honor it, other than trying to make sure your note doesn't reach it, which is very hard since anyone of your followers can broadcast it to such a relay. Its really not much different than someone screenshot-ing your tweet. I like @rabble 's take on being able to dissaciate from your note atleast as a signal.