Broadway - 8:18 pm on Apr 23, 2013 (gmt 0)
The whole idea of the big arrow was totally unethical on Adsense's side. How could anyone, for even one second, not think that their whole motivation for them was to dupe website visitors into thinking they were navigation.
The proof is here:
1) On sky scrapers, the arrow was often positioned quite separate from the ad text, toward the bottom.
2) On leaderboards, the arrow was pushed way to the right, the text to the left.
It's just so incredibly hypocritical for Adsense to blame/punish the web publisher for the ads performing exactly as they were designed.
I complained about them here some weeks ago. My whole motivation for entering the realm of responsive website design (in this case increased size of text and navigation on mobile devices) was because of those stupid arrows and trying to counter act the way they tricked people.
By the way, I'm not one of the 5000.