Earlier quoted context omitted.
Where is the theft? If that website allows him to download the pages without a 401 or a 403, then how is it any of their business how be prefers to consume that content? No theft has occurred. Not even in the half-assed "copyright infringement is theft" meaning that some slack-jawed quarterwits have started to use the last decade or two. It is not harming you to decline to buy something from you, not even if you real…
Do you see no distinction between * downloading and transforming a document for one's own consumption (as with e.g. ad blockers) and * rehosting it with no permission from the writer ?
The absence of 401s and 403s indicates tacit permission to me.