Since there is more data unlimited iPhone plans, and it's obvious iads uses data.
Just don't click on the iAd banners.
Honestly, I don't see how iAds wasting data quota is any different from any other ad service you find in apps or the Internet wasting data quota.
While you're at it, are you going to sue people who send you e-mails that might put you over your quota?
This doesn't stop it from showing you ads, just personalized ads.
Comes a point where you realize that there is a large number of people who just shouldn't buy an iPhone.
Since there is more data unlimited iPhone plans, and it's obvious iads uses data.