Of course it is. A list would be mostly useless unless it was editable. But, the content? That's another story, especially if the implementation breaks compatibility in a rather almost combative way.
Yes, you can obviously do that. But should you?
I certainly will leave edits to those who wish to use them, though, I still don't think this is a good move for the whole of NOSTR. Adding complexity to a pillar is the protocol is not what I consider a good thing. But, I'm also not a dev/coder so I can't really say much about it in a practical sense.
Rock on with your bad self.