My flight tonight, three people were asked their meal choice before me. One of them had a visible SE tag, and it seemed an obscure enough order that I trust it.
I said "I don't care, ask me at the end".
She came back, and said "we still have both options". So I asked for the pasta.
Meals come out.
"I'm sorry, I miscounted. We only have the chicken. Is that okay?"
It's like I try so hard to make their life easy, and they still disappoint (very slightly - the chicken was actually pretty good, and I really didn't care).
It's actually a pretty serious problem though. It's possible I really don't care what I eat, but I take medication based on what I'm going to be eating. So telling me I'm getting one thing, then serving me another, could cause problems.