Actually, as often as I criticize AA, to the point that I prefer to use CO for my domestic US travel (and give up Club/Asia Miles), I must admit that the 2 times I wrote to them within the span of a few months, they've replied very quickly and with what I considered decent compensation. The first time, they blamed weather and I missed a connecting flight and had to spend a night in St. Louis, MO. We had clear skies with no passing storm or route change, and actually landed on time, but the gate closed 2 mins before and they wouldn't open it for me despite my boarding pass. I complained and they covered my hotel stay and gave me a voucher. The 2nd time, I had already obtained Ruby status, and they didn't honor that in SJU when I stoodby for a flight. On top of that, on the flight I managed to get onto (a/c A300-600) something from the ceiling in the lavatory fell and almost hit me while I was inside. Granted it wasn't something extremly big or heavy but it did make a loud clunk when it hit the sink. Again, they replied in 3 days and I got compensated.

I agree with the passenger above in that shutting the bathroom down for 3 hours on a 16 hour flight is pretty inexcusable. What if the passenger had a reaction to the food he ate? That would cause a huge problem. If he had any alcoholic or caffeinated drinks before, he would require a bathroom because they are diuretic agents. I would write to CX and complain. They made a mistake, and a shocking one if you ask me, since this could have health implications.