I don't think I'm allowed to put a link up here, so I'll just say it:
The offended page of Encyclopedia Dramatica. Called by some as "the final boss of the internet", it is a page filled with every single famous shock-image on the internet, as well as several other horrors from the dark reaches of the web.
The weak and non-Jaded who scroll through the entire contents of the page linked below may come out afflicted with insanity and severe mental damage. Those who are daring, go onto Encyclopedia Dramatica and search up 'offended'. Scroll with care, exit when necessary, but do it somewhere private with closed windows.
And just to spice up this Halloween season, here's a horrifying picture of a kitten wearing a pumpkin mask.