Yesterday while flying United Airlines Flight 882 from Portland, OR to Chicago, I was given an inaccessible seat. It was the middle seat in a three seat row, where, under the seats in front of me I discovered a set of metal stanchions, which, in turn made it impossible for me to get my guide dog safely underneath the seat--hence, out of the foot space shared with other passengers. Then, the airline stuck two people on either side of me.They asked me to get up so a non-English speaking passenger could get all the way in to the window seat. I complained and said they should reseat me where I could actually sit. They in turn looked at me as if I might be some kind of half human cockroach. The airplane was a Boeing 757 which has bulkhead seats in an exit row. People with disabilities are barred from sitting in an exit row. First class was full. Under the Air Carrier Access Act, my right to fly safely and in comfort is not up for grabs. But what really bothers me, even a day later was the easy dismissal of my situation by the United flight attendants. I learned from a fellow passenger that the crew even managed to gossip about me--was I some kind of cranky man? United, your record in this area has not been good for a long time. You embarrassed yourselves yesterday. But you had a full flight, didn't you?