No, no, no! NOT because you're in a scooter or a chair or something, but because you're a human being and deserve courtesy as such! I also hold the door (for example) for the so-called "able-bodied."
For some reason this area just teems with incivilities, impolitenesses, and discourtesies, especially towards women. A man will walk directly into a woman who is standing out of the way and when he passes her he gives her a nasty look as if she should apologize to him.
I do my best to fight this by trying to be courteous to everyone, not just someone who happens to be a woman, or in a chair, or on crutches, or carrying something, but because they are human beings and, if you like, made in the image and likeness of the Creator.