I didn't read through all the posts, but I believe it depends on how your doctor describes your condition.
I had left the work force before developing UP (proctitis), so I never dealt with this issue. However, in my opinion, people suffering with moderate to severe IBD should definitely receive disability.
Unfortunately, I know a few people who receive benefits and don't deserve them. One says she is depressed , but manages to run to the casinos every week and the other receives benefits for CFS (chronic fatigue) and she can run circles around me. So there ya have it.