The Crohn's and Colitis Foundation of America already offers a plastic credit card sized card that you can supposedly flash to show people you need access to employee only bathrooms or to cut in line in front of a bunch of people in a public restroom. Personally, I would find this very humiliating to use, but I'm an introverted person, so maybe that's just me.
At my sickest, I either stayed home or only went to the few necessary places where I knew there were multiple restrooms with multiple stalls. I also practiced the techniques in Jini Patel Thompson's book Listen to Your Gut that help you control even urgent bowel urges. I found them very helpful and never had accidents, even during my worst flare ups.
Diagnosed with ulcerative colitis spring 1999
C-scope confirmed UC diagnosis 9/18/2007
No explanation for right side pain and thickening of bowel wall
Maintenance dose sulfasalazine, back on a pred taper for first flare in years
Probiotics, l-glutamine and fish oil caps. George's aloe vera juice and Mucosaheal.