there is no such a thing as an ethical comment.
Comments are a cynical deployment of our knowledge of crowd wisdom, media manipulation, and statistics to make people part with their opinions for others they wouldn't think they agree with.
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Sorry, there is such a think as "more" ethical ads. If you want to be pedantic and argue they should use "more" suit yourself. But things are not black and white, your comment is in itself "manipulating" the reader trying to convince them that ads are all the same and that they cannot be put on an ehtical spectrum which is not true: tracking ads vs billboard, I'd much rather a billboard (which I hate in and on itself as they are usually just making the place they are in uglier).