I worked in an airport for 3 years. I worked for an ice cream shop for a year and a technology store for 2 years, both within the secure areas of the airport. I did not even work for the airlines (or the airport, or TSA) and I got screamed at often. The people flying through were just miserable a lot of the time. I got yelled at by passengers because security lines were too long, their flights were delayed or canceled, they could not smoke inside the airport, another store was closed, noone was in the food stand next to the ice cream shop, and on and on and on. I even got yelled at by airline employees (who are yelled at daily and should know that I'm not going out of my way to help you when you are yelling at me) for things that were out of my control. I remember one pilot when I was at the ice cream shop that got mad because I did not have a lot of the flavors listed on the menu. I was the only one in the store at the time (and he could very obviously see that, there were no back rooms or closets or anything where someone else could be hiding) so noone could go to storage and get stuff and I'm only a little over 5 foot and the menu was hanging from the ceiling and I did not have a ladder to change the menu.
I would even go out of my way to help customers, especially at the technology store and I still go yelled at. There was one woman that spoke no english at all. Her flight was delayed or canceled and the airlline gave her a voucher for a hotel room, but offered her no further assistance. She called the number, operator on the other end only spoke english, so passenger handed me the phone to help. The airline did not put the code necessary on the voucher so I could not do anything. I took the passenger down to the US Air customer service center (which was the airline she flew on) and put her in line. I went up to the agent, very nicely explaining what happened, that I had to get back to work, but passenger was waiting in line. I got all kinds of rude from "customer service" agent. I lost money (we worked off commission) to assist airlines customer and I get nastiness in return....
I am no longer at the airport, got offered a new job this summer (which I love) and jumped at the opportunity. Still get all kinds of nasty people but for the most part everyone's extremely nice. I even have several people thank me every day for what I do, which is nice. Best decision I ever made was leaving the airport.