Indeed. Robots.txt has worked for many years, and it was just a moral choice, not a technical barrier.

Transparency is a good way to air out bad behaviour allowing others to see it and stop cooperating with a bad actor.

There are ways to have strong “signals” and guardrails for the expected behaviour in the NIPs.

Choice is a strong force. If you can choose the behaving relays, services etc. it goes a long way.