I need to add that it wasn't just about the kid being loud( it was noticble but not loud), the older couple felt the kid was really ill and needed help and the mom was abusing her. They were rude, geeze it's a kids's show so if a kid with asthma is going to ruin the show maybe you need to stay at home because kids/people tend to "ruin" things when they try to live.
I'm sorry but Disney and their shows are not just "kids' shows". I have kids with asthma and we have had an issue at Disney with my youngest's asthma on our last trip as it was set off because of an allergic reaction from housekeeping's negligence. With that said, I would not sit in a show and expect others to listen to my child cough.
I do not agree with the way the older lady handled it but she was probably irritated by not being able to enjoy the show. How do we know that the coughing did not interfere with her hearing?? It is disturbing and maybe it did ruin the show for that woman. Not everyone can go to Disney numerous times and you just never know if this was this woman's only time getting to go.
As for the comment about not going anywhere because kids/people ruin things, I'm sorry but parents and people can have a little more consideration for others. I don not find it appropriate for a child to remain in a theater screaming nor do I find it appropriate for a child to be jumping on a bench or climbing over or messing with my family while they are trying to eat dinner at a restaurant. These behaviors do ruin experiences but why should I or anyone else have to stay home because of someone's kids behaving bratty??
One more thing in reference to the older woman, since she did not know the child had asthma, she could have thought the child had any number of contagious illnesses. Maybe she was genuinely concerned for the child and just did a poor way of showing her concern.