I'm on the bus to Seattle

I've taken many a bus to Seattle to kick it. This time around I'm going to the bumbershoot festival. Today, on this bus, there are many kinds of people. Passengers from an Alaskan, cruise, some Quebequois, a man who is just visiting his kids, all sorts. 
There are two little boys on this bus. They are so cute, maybe 2 and 3 years old, and they have their little kid voices speaking Spanish non-stop to their parents. I can understand most of what they say, particularly the older more talkative one, with my limited Spanish knowledge. It consists mostly of "¿que eso?", words I've used in my first AND second year spanish class. 
Sitting across from me is a middle aged American couple. I only know this because the woman was nagging her husband to ask for the "non-Canadian or American" form to fill out. He was pretty sure they didn't have to but she told him to check. I just told him he was right. Anyway, this woman must not have or want children. Earlier she loudly groaned "oh this'll be a long four hours." when the kids started talking. Once we got to the border, she was sarcastically looking forward to "hearing them scream the whole bus ride from here to Seattle." Once we got back onto the bus after customs, she wouldn't stop insisting to her husband "Do you smell that? It smells like urine in here. Do you smell it?" And she complained about something else I can't remember but it sparked me to write. 
I'm sure she's a nice woman, but what makes a person talk/think so snootily? Speaking without thinking one can offend or hurt someone's feelings or something is exactly what I teach kids to NOT do. I'm already well into the "grown up" demographic and I'm very upset that there are people who are also considered grown ups that act like that. 
Maybe I'll consider teaching a class called Common Sense 101. Made for people who don't think they need it.