On iDay2, I stood in line at both AT&T (3 hours) and then the Apple Store (6-6.5 hours) and the people I stood in line with in my immediate area could care less if you had to take a bathroom break. At the AT&T store, I made a drink run for another guy and myself.
I had started coming down with a really bad cold and by the time I went to the Apple Store I was feeling--not so great. My line mates-- did not mind that I went to the bathroom numerous times (I kept drinking anything and everything to soothe my sore throat). In fact, I had to run to the Barnes and Nobles across from us and by that point the Apple employees had moved everyone into the store and locked everyone else out so they could end the night. My line companions made sure that the Apple employees would know that I was coming right back and to make sure they let me back in! Their thoughtfulness was very touching and appreciated.