The messed up thing is that at that weight you cannot feed yourself/cook etc. So someone is actually feeding you, and not only that, but feeding you 1000's and 1000's of excess calories per day, thats borderline abuse in my opinion whether or not the bed-bound fatty cares or not.
On a similar note there was a TV show on in the UK a few years back about People who deliberately overfed their wives so that they stayed chunky (see massively obese!) some even slipped like weight gainers into their food and stuff, sick as hell.