I hate hate hate level scaling. I believe they also introduced it to WoW, which ruins the power fantasy of going back to a lower level area and kicking butt, or the fear of venturing in a higher level area and hauling ass out of there. I agree, lazy game design.
I agree, I don't like it either. But... how would they then implement a world where you can wander everywhere? What it brings to the table is that you can wander across the world and not become terribly outmatched as soon as you wander "too soon" to an area.
My gaming preference is to go to an area as per game design, so the fact that I would be outmatched does not bother me and would prefer it that way. I do, however, understand why the game designers chose level scaling for what they wanted to achieve.