If you aren’t familiar with the webcomic xkcd, then you’re really missing out. Fantastically intelligent. I’ve often wondered how long it would take the comic’s creator, Randall Munroe, to find the SDMB. Seems like it’d be right up his alley – cite.
But now some superasshat conspiracy theorist has already registered with the username xkcd and forever removed that user name from circulation.
It’d be like someone joining with the name Weird Al Yankovic and then starting a holocaust denial thread.