Are there still people browsing without those blockers???
Just kidding somewhat, I know I live on a different planet but I personally cannot use the web without protection from additional content purely aimed to district me from the reason I visited in the first place. Or just the idea that a page would load external script and flash from various to me unknown commercial parties -- it would seem a very unsafe idea to surf like that every day! That's just me though. Anyone is free to board any ship and cross any surf how he or she seems fit.
Ads might have "made" the web in several ways, it's also breaking it, in several ways.