One of the things that I love about being a developer is you get the chance to hide Easter eggs in apps...and what nerdier Easter egg is there than crediting the team simply by entering the Konami code? So naturally, we added that to ADT's 404 page. Try it. :)
Edit: It has been brought to my attention that a new developer has decided to "optimize" things by ripping out the easter egg. Exactly how much was gained by optimizing a 404 page is unknown at this point, but all I have to say to the developer is boo, you suck!
