We pay for everything in the box, whether that's how you like to look at it or not. Nothing is "included for free"; it's all factored into the selling price.
Around here, I have at least one FW charger, and two or more usb chargers for 3 iPods, one of which practically lives on an alarm clock/charger, and one that rarely gets used. The last iPod doesn't move around much, and so stays plugged into the wall a lot.
The point is, I have more chargers than I need by about 2. Next time I buy an iPod, I don't want to pay for a charger just because you need one. Next time you buy an iPod, pretend it costs $30 more than it does and buy a charger. Let's say Apple raised the price $15 and included the adapter-great for you, what am I? Chopped liver? I don't want to subsidize your charger, sorry.
Who's unreasonable? The guy who doesn't want to pay for something he doesn't want, or the guy who doesn't want to pay for something he does want?