And for many of us, it's not practical to have a lighter stroller. I'm in a really cold place and it was the larger stroller that allowed me to weather proof, have a carseat handy for if I needed to cab it back with groceries and space for the groceries themselves! We had no car so it was really the most practical thing for us.
For the two seconds it might take to get around someone with a "behemoth", especially someone who might be struggling with more than one child, is it really worthy of the glares and nastiness that some moms get?
There needs to be some sort of parental responsibility and extra awareness when you extend your space by 3ft. I know I'm preaching to the choir here, but it is very irksome to those of us who are trying to be courteous having it ruined by those who are not.