A few people putting misinformation on the Internet - which isn't restricted to AI crawlers in any way, even the new disclaimer is something an AI model is likely going to notice more easily than a human since they read faster - is not going to stop AI capabilities from advancing.

We're in "something must be done; this is something; therefore it must be done" territory here except usually the something in question is merely useless and not directly harmful to bystanders in the way this proposal is.