Yes, it is an in-joke. Sorry.

CROWD: A blogger! A blogger! A blogger! We’ve got a blogger! A blogger!
VILLAGER #1: We have found a blogger, might we burn him?
CROWD: Burn him! Burn!
BEDEVERE: How do you know he is a blogger?
VILLAGER #2: He looks like one.
BEDEVERE: Bring him forward.
BLOGGER: I’m not a blogger. I’m not a blogger.
BEDEVERE: But you are wearing an “ATOM-R0X!” T-shirt.
BLOGGER: They dressed me up like this.
CROWD: No, we didn’t — no.
BLOGGER: And that isn’t my domain name; it’s a fake one.
BEDEVERE: Well?
VILLAGER #1: Well, we did do the domain name.
BEDEVERE: The domain name?
VILLAGER #1: And the T-shirt — but he is a blogger!
CROWD: Burn him! Blogger! Blogger! Burn him!
BEDEVERE: Did you dress him up like this?
CROWD: No, no… no … yes. Yes, a bit, a bit.
VILLAGER #1: He has got a website.
BEDEVERE: What makes you think he is a blogger?
VILLAGER #3: Well, he asked me a question about MarsEdit.
BEDEVERE: A question?
VILLAGER #3: …or it might have been about OpenOffice.
VILLAGER #2: Burn him anyway!
CROWD: Burn! Burn him!
BEDEVERE: Quiet, quiet. Quiet! There are ways of telling whether he is a blogger.
CROWD: Are there? What are they? Do they hurt?