Two weeks ago, an automatic session-hijacking plugin was released for Firefox. It was named Firesheep, and it's been downloaded over 600,000 times so far.
Yet the decision to release Firesheep publicly is a controversial one.
In an interesting judicial twist and counter-twist, a juvenile scofflaw in San Diego has been banned, and then unbanned, from using sites such as Facebook. He can now use Facebook, but only insecurely!