The other thing is if they CHANGE the TOS. Who goes back and reads it again, even if they read it the first time. I actually did this year, and found some stuff that might be new or maybe I just didn't remember. It wasn't anything that caused any changes on my part, but it *could* have been. So now I plan to add that to my twice yearly "do this when the time changes" list, along with swapping out the batteries in the smoke detectors and carbon monoxide detector - re-read the AdSense TOS.
One of my more cynical twitter followers suggested that it might be a precursor to a new wave of mass bannings; gives em something to point to to prove they're being fair, so to speak. I'm not sure I'm ready to go quite that far, but it's an interesting theory.
What they need to do is take a much stronger stance against sites that blatantly copy, jump to #1 in the rankings , and rake in the AdSense money off your own work.
That would be great, but it'll never happen. Google wants things that scale. That doesn't scale.