The source of all that is evil and wrong on the Internet.
If you've ever seen something on the Internet that made you contemplate suicide (or snap and become a serial killer), it probably came from 4chan--and even if it didn't, you can be sure someone posted it there at some point... and people there LIKED it.
GUY: I just sold my soul to you, so... does that mean I'll spend the afterlife in a bottomless pit of eternal pain and suffering with millions of others just like me?
SATAN: You mean 4chan? No, even I'm not THAT evil. You're just going to Hell.