Explain xkcd: It's 'cause you're dumb.
- For a list of comics, see Comics featuring James Zetlen.
James Zetlen is one of Randall's friends. He was credited as the inspiration for 18: Snapple and 107: Snakes on a Plane! 2 and is referenced in 1360: Old Files. According to an archived version of his personal website, Randall is an old friend of his. Randall has publicly used his full name only once, in a blog post about the "simple writer" James made for him:
Thank you to James Zetlen, who helped make the word checker work on other people’s computers and not just mine.
To my knowledge, my friend James and I are the origin of that urban legend, through xkcd. We used to joke with a third friend about how gullible she was, and made that up as one of our many stories to her. I would check any references to the legend -- unless they're dated from before late 2005, I don't think there's any reason to assume it existed before I started it.
On the xkcd IRC channel, he goes by "zetlen", but he used to go by "khmer" and sometimes "khmer_at_work", as evidenced by his hostname recorded in this xkcdb entry and others. There are other quotes of "zetlen" and "khmer" and in this one, he jokingly claims he is the source of half of Randall's ideas.