As for what is ethical is actually arguable, when talking about Google. Ethics are all relative -- certain things that Google allows or does, someone else could say it's unethical itself. The crux of the matter is what does Google allow or filter at a given moment. Think of the bigger picture though -- what one can pull over on Google today, may not be the case tomorrow. So one has to think is it worth getting snagged down the road, and worth the price of the recovery process of getting back in results pages (i.e. the time spent sitting in the dugout).

So it's a question of is it "ethical to Google", and since hidden text / links is on their short list of no-no's, any code that squeaks it by today will eventually get pinched later.

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