(Mashable.com) -- You can't block CEO Mark Zuckerberg on Facebook. Try it. You'll get an error message that says, "General Block failed error: Block failed." We don't know whether it's a bug or an intentional inside joke, but Facebook's developers have created jokes and pranks in the past, so we wouldn't put it past them. Of course, we're also not sure why you'd want to block him; it's not likely that he's spamming your wall with unwanted FarmVille invitations. Nevertheless, there's a website called Block Zuck that acts as a sort of catharsis for people fed up with some of Facebook's recent choices, such as allowing your friends to location-tag you in Facebook Places by default with no confirmation from you.
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An error message will pop up if you try to block Facebook's CEO
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There's a website called Block Zuck for people fed up with Facebook's recent choices
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Facebook friends can tag you in Facebook Places by default with no confirmation from you
Either way, you can verify this by going to Zuckerberg's Facebook profile, scrolling down near the button of the left panel and clicking "Report/@placeholder this person," then checking "Block this person" and clicking "Submit."