I flew home for Christmas today with my 14-month-old. I was in the middle seat of three with her on my lap. I've always breastfed her on take-off and landing to help with the popping ears and also it keeps her quiet for a bit 
Today she was also due a nap when we got on the plane so I got her feeding, sitting on my lap facing me with her head in the crook of my arm. I've done this before on flights and had no issues. Today, however, the air stewardess told me she had to be facing forward. As DD was half-asleep by this point she was not very impressed. I had no idea this was a rule. Like I said, I've never heard it before, and I'm assuming it doesn't apply to all babies as it would be quite hard to hold a tiny wee one with no neck control facing forward.
Has anyone else been told this?