I've had similar experiences at OSH. The ground handling volunteers there often know nothing about prop blast, and some of them don't care, either. Nevertheless, I've stopped and told them to help me push in. They did so, after some rolling of eyes.
Good points all, folks. Ground courtesy with prop wash helps everyone--it minimizes erosion on your prop, and keeps from pissing off the neighbors.
At the airport, I've had a number of pilots ask why I stop the airplane perpendicular to the hangar space to shut down. I explain to them that this way, I don't blow tons of dirt, sand, etc, under THEIR hangar doors by blasting it around, when all I had to do was push the tail around by hand.
MTV