I have that same question. Our extention agent says to make sure I get that, but I wondered what everybody does for that.
Nope, don't do that either. It is usually only recommended for large farms/operations where disease can easily crop up or in areas where the disease has a history. If your extension says it is a problem in your area, your risk of brining it to the flock is higher, and if you flock does get it, you will have to vaccinate all future chicks. But if you have a fresh flock on fresh land, and under like 100 birds, don't worry about it.
I know some people do vaccinate for various diseases. I'm thinking it might be more of the show breeders. They have a lot of years, hard work and money invested in their stock. They also have their birds going to shows, with more potential for exposure. I don't think most backyard flocks get vaccinated, unless they came from a hatchery.