I think this lady is the asshole for making a guy put his sandwich away on a flight.
What do you think it was smelly or something?
No, I think she is too nice for that reaction.
Eating food can be problematic when it starts to affect others. If someone asked someone else to put away their food, it's an understandable request and it should not be something held against the person, especially if the person was just doing their job. Instead of thinking that the person is an asshole for making someone put away their food, try to understand that the rules are there for a reason and it's important for everyone to abide by them when they are on a flight.
Nah, it's not what I want to do.
Well if someone has an allergy it is really important to put it away because everyone has to breathe the same air all flight. You wouldn't want someone to microwave fish in an office would you?