Information flows freely, and you might be astonished how much you can find about how to blow up things and how to create explosives with household chemicals. One name that keeps popping up when searching for such information is the Jolly Roger's CookBook. There are many versions avialable on the internet, most provide detailed information on how to do many illegal things. Freedom of speech is one thing, but I found out how to make explosives, which household chemicals can be fun and how you can make a projectile weapon for your explosives in less than 5 minutes. Perhaps some kind of regulation is required.
Urban legends are a specific type of folklore, stories that are amazing.
Sometimes true, most of the time just made up. Snopes2 has a lot of Urban Legends, and the couple that maintains the site research all the sories on how much of it is true. With the attack on the USA on september the 11th, a whole new series of urban legends was born. On this page you can find the latest. Not only the stories, but all of them with a status true or false and an explanation.