Personally I take offense to the original comment, because I was one of those "backpack on wheels" people...not because I'm lazy, but because I've had a bad back problem since the 9th grade, and I have no choice but to use the wheels or endure pain every day. I've only had to use the wheels during semesters where I have large and heavy textbooks.

And I agree with AKAtude--children and parents are encouraged by their schools to get the wheels because they're carrying more supplies and the books are getting bigger. I went shopping with my 9 year old cousin the other day, who was horrified and embarassed that her mother was buying her wheels. I fill her head with stories of my back problems and that shuts her up. It's a good thing now that many companies are coming out with backpacks that are designed to reduce the strain on your back. Aren't you only supposed to carry 20% of your own weight on your back? If I'm wrong, please correct me!

I agree, getting run over in the halls is annoying--but please please please don't be so quick to assume that these people are lazy.