I remember the day Draw Something started abusing push notifications: the paid version was sending me ads for other zynga games. What sucks is push notifications are almost essential for the functionality of the game: without them, you have to constantly check if it's your turn. I and many other people deleted the app as soon as the ads showed up. Talk about destroying a very valuable network effect for a quick profit-grab.

I'm now part of that group who reflexively rejects notification requests. I agree with this article that Apple should take action, but app makers should also realize the cost of abusing their customers.