Re: Bizarre argument
Not those. The ones the site owner is complaining about, about Google plastering ads for rival firms over his original content. Neither the site owner nor the client agreed to that.
So it's like someone pasting over one poster with a rival firm's poster. It's not as bad as say Amazon advertising its own (cheaper) product on the same page as someone else's version of said product on the same page, but it's not kosher, either.