It's scary that a term like "gas lighting" is being used in this context. Pretty soon, no one will be able to raise children or teach them a thing because it might involve the children being unhappy or upset. Heaven forbid.
Children have to be taught self-control, patience, and tolerance. They have to learn how to cope with situations that are not ideal. That's part of growing into a functioning adult. It doesn't matter if you're tired, hungry, sick, or angry, unless you are wearing a diaper and drinking from a bottle, you are expected to start dealing with these less-than-ideal circumstances in an appropriate way. Screaming and crying is what babies do because they haven't yet developed to the point that they can have a more appropriate reaction. It's the parents' job to begin teaching the correct responses instead of making excuses for inappropriate behavior (ie: Oh, he's tired, hungry, etc.") The child may BE tired or hungry, but at what point are they going to learn that being tired and hungry does not mean acting like a brat to everyone? It's not acceptable behavior. Period. And as a high school teacher, I can tell you that when they get to be 16 years old and STILL haven't learned how to cope when things aren't ideal, it can get downright ugly/scary. They're the ones that curse, fight, and destroy things when they are upset because they are still infants/toddlers developmentally when it comes to coping with certain situations. And they are the adults who can never keep a job or any sort of stability in their lives because they've never learned how to be responsible for their own reactions to situations. They quit jobs, walk out of marriages, neglect their own children, etc. because they've never learned how to push through and DEAL with stressful situations.
It's a vicious cycle, and those who mean well by sheltering their little darlings early in life are only setting them up for a lifetime of hardships when they are faced with situations they cannot handle.
I rode many a mile in the backseat of a car with my brother hogging most of the seat and tormenting me. There were no TV screens with movies playing, no video games or cell phones. There was the view outside the window and books. And we listened to our parents discussing whatever parents discuss about the world, listened to the music on the radio that our parents listened to (which I still love today), and knew that if we misbehaved we were in for it when that car stopped. That's not "gas lighting", that's raising children.