One thing that helps a crip survive is good manners. It's a fact that jerks get waited on last, whether the jerk is in line at the hardware store or happens to need personal attendant care because he has a physical impairment. Thus, "good manners" -- and appreciation, even if it might be necessary to fake it.
All this is brought to mind by a story circulating about a man with MS captured by a nursing home in British Columbia, Canada. He uses medical marijuana. Apparently the nursing home administration doesn't like that, even though the medical marijuana is provided to him by the Canadian federal government.
The result? The man claims the nursing home administration took away his power wheelchair and has sentenced him to seven days in bed. Thus, no marijuana, given that the man was using his power chair to move out away from the facility so that he could smoke the marijuana without disturbing other inmates.
What does this have to do with being a jerk? Not much, really. The man is only demanding what is rightfully his, but when a person is dependent upon other people, that demand can sometimes be classified as jerkinesss.