I have been to Disney with and without strollers. It's the same all the time. There are rude walkers and rude stroller pushers. We can't stereotype against either because plain and simple, both sides of the coin can be disrespectful. (Case in point: In August after Celebrate the Magic, I was stuck with my stroller in the middle of Main Street while the herd flocked to leave...one group asked me if I wanted to go in front of them because we had a nice conversation while on line for a ride.) What some also need to be mindful of is, as someone else posted, that there are children who may be sick and need a stroller. We may not see that they are sick but they just may be. For that matter, no parent needs to really justify to anyone as to why they have/not have a stroller.
I think everyone should agree that there can be people on both sides and we shouldn't discriminate against either. I'm just keeping the peace, people.