Your point about the first click does necessitate revision. Let's exclude unknowing clicks from my original claim. That leaves at least two (a) the domain name makes it clear there will be ad-supported content on it and (b) the second or later click on one which you now know has ad-supported content. Block ads while consuming their content is a parasitic relationship with less benefit to them at the least and piracy at the worst.

Definitely not a "duty" people have to do such a thing. The malware issue is a valid concern and people may decide on that issue. They're still pirating the content if they keep doing that on websites they use. Web metrics show this would be the majority of site visits for majority of people following his recommendation.