This was an utterly terrible idea to begin with and it’s still a terrible idea for Android apps as well. Apart from messing with ad blockers, this has the ironically “helpful” feature of allowing malware to be force loaded into your browser. If it ends up in Android, some popular app that uses it will get owned and then every user of the app will also end up getting owned as well.
The alternative exists, but it costs money. Most big YouTuber accounts (at least the ones I’m subscribed to) post on either Nebula, Patreon or some platform like that. It would cost quite a lot to subscribe to them all, but still less than YouTube premium in my country. So in the worst case scenario where YouTube really blocks all ad free interfaces except paid use, that’s my answer. I don’t like it as I think a lot of the content is overpriced for what it is, but it’s better than having $$$ swallowed up by some mega corporation that is just interested in screwing authors and viewers over as much as possible.
Web environment integrity is a non-starter because it offers avenues for bad actors to enforce “integrity” that forces malware to be loaded as well as legitimate page elements. However, that doesn’t mean Google won’t keep trying to stop ad blockers, alternative interfaces etc in the future.
Signal. Also, the solution to the “no-one on signal” problem is simply to refuse to use insecure platforms like WhatsApp. If people want to talk to you then, they have to download signal. They might get annoyed with you, but sometimes a bit of coercion is necessary to get people to do what’s good for them.
If this kind of thing becomes widespread, then people will find a way to broadcast fake anti-camera signals as well. Imagine a thief breaks into your house and you want your security cameras to record them… but guess what, the thief broadcasts an anti-camera signal and they all switch off, completely neutralising your security system. “Unintended side-effects”