Your last point is a very good one Glen and I think I'll have to think twice in future before I fly off the handle in chat...Being disabled will automatically discriminate you in "normal" society. His playing style looks a bit different because of the way in which he has to play but if you were playing against or with him you would have no way of knowing that the person had such limited functions. Just learning a method of playing and still remaining within the rules of no macros and cheats ( when in this case you could argue that they have a genuine use ) is inspiring.
I've tried playing BF3 on the PS3 with a controller and failed horribly because of a lack of commitment yet this guys achieves that.
It also shows why comments and abuse in chat should be treated seriously because you never know who is also reading them and how it may affect them.