If your curmudgeon needs fine tuning be sure to check out this book The Portable Curmudgeon A keeper for sure.

Regarding ADA access, at one time I had a guy in a wheelchair working for me. Occasionaly we would leave the office at the same time and I would try to help him get to the train (BART) and on his way home. He was a fantastic programmer and very patient. I would be ready to scream at the hassles he was subjected to just to do the simplest things. Like crossing the street without getting stuck in the streetcar tracks, negotiate the train elevators and fare gates and squeeze onto a train. Everything was a challenge. It was a real eye opener for me.