No, they are probably not your "typical" survivalist as portrayed in movies and such, but they do have a very good survival sense, and they believe strongly in being prepared for crises. I don't remember the specifics, but they encourage having enough food stored for a certain amount of time, and having enough money saved to live on for a specified time. The ones I know are not your stereootype paranoid end-times nuts. They are educated, reasonable, and sober in thought.
And as for the kidding- yeah I figured so, but alot of people really take this stuff seriously. Given that so many in our population have no clue how to grow or kill food to eat anymore, it's really something that is worth considering. Major metropolitan areas have, on average, three days worth of food to feed the entire city in an extreme emergency. When food runs out, people get pretty panicked. I don't mean to sound like a doomsdayer, but I come from people who grew and killed much of their own food. I was taught how to survive.