How the hell did that happen?

As I was creating my latest post for my blog yesterday while sitting in the terminal of the airport, I happen to see a older woman frantically looking around. So, being a good Samaritan like I am, I asked this dude next to me to check out that bat flying around lost......kidding. The lady saw me looking and approached me and asked for the gate for her upcoming flight. I pointed to the big screen which has all of the upcoming departures and said to find her destination, match it with the flight number and the gate will be at the right hand side under the gate column. So the woman heads to the screen and stands there for I swear 5 minutes, glaring at the monitor. She finally decides to pull out her boarding pass and tries to locate her gate. In disgust, she turns back to me and walks back with that look of "ok, I don't want to be a bother, but I cant figure out how to get out of a paper bag so how the hell do you expect me to read this monitor"? Well, she could have said that inside, right? Anyway, realizing she needed help, I take the boarding pass and head to the monitor. Ok, destination....Atlanta....check. flight number......hum....dont see it.....ok, what time does it leave......2:10. Holy cow, its already 1:40, she would be boarding already. Where the hell is this flight....carrier....Delta....Delta? There is no Delta flights coming out of this concourse. I looked at her and told her that she is in the wrong concourse. I asked how did she get in this concourse through security? She said "I don't know and just tell me where to go now". Wow, not the nicest person in the world, but I understand she is in a hurry. I told her to head back to security on this concourse and ask them which concourse has this flight and have them escort you to the flight as it should be boarding now. She gives me that look...you know the look. Its the look like "damn, I am screwed and I barely understood what he just said but I am too embarrassed to ask again". Yep, that look. So I said again "just head to security and they will help you". She grabs her stuff and off she went.
As I sat back down, I was wondering how the hell did that happen? Wouldn't someone in security when checking the IDs, see that she would be entering in the wrong concourse and turn her around? Using my illogical mind, I think this is how it happened:

Security: Good afternoon madam, boarding pass and ID please.

Lady: Why? I don't want you snooping my ID for my personal information.

Security: What? No, we need to verify who you are and check it against your boarding pass.

Lady: I know your type, still living in your mom's basement, playing video games till the wee hours in the morning and smoking pot. Look, you cant even get a decent haircut.

Security: Madam, I just need to see your ID and boarding pass please.

Lady: Dream on, John Lennon looking bum. I wont have my neighbors see some homeless bum camped out on the lawn begging for food.

Security: What? What do you mean homeless? Madam, If you dont give me those items, I will have to ask you to step aside...

Lady: Here you homeless bum. I got my eye on you.

Security: Excuse me, madam, but you are at the wrong....

Lady: Yeah, see I knew you were a loser. Cant you read? There is nothing wrong with my boarding pass and ID. Its not expired. Will you hurry up?

Security: Um, you are good to go madam. Have a nice day.

Lady: Its about time....thank you.

Yep, thats what I think happened..... What else could it have been?