And to clarify.. they can use kind 1 for general content (non-explicit profile picture, non-explicit banner, likely toned down profile, etc). But as soon as it becomes offensive and blasts unwanted content into general feeds - it will be a problem. We’ve had porn blasted in general feeds and people hated it… people even stopped using Nostr altogether.
Maybe they should have two accounts. One for general use posts, and one for explicit. Or just use one, but have toned down imagery. And only post explicit content to targeted relays. Problem mostly solved.
Nostr is a Protocol to support many use cases… not a dump everything in kind 1 because I think I need to. If people care enough, apps will add support for kind 69 or whatever you propose.