I don't think most people would dispute that games in general are worthwhile, but I think there are also arguments to be made about the quality of what Zynga do

I don't think most people would dispute that games in general are worthwhile, but I think there are also arguments to be made about the quality of what Zynga does. Obvious example: http://www.bogost.com/blog/cow_clicker_1.shtml http://www.bogost.com/blog/cow_clicker_1.shtml