17. Wikipedia: Vandalism, http://en.wikipedia.org/wiki/Wikipedia:Vandalism (last visited July 3, 2009) [hereinafter Wikipedia: Vandalism]. Like the definition of wiki-spam, vandalism has multiple definitions. Compare Ayers’s supra note 16, at 209 (“Vandalism is, by definition, a change made to Wikipedia with the malicious intention of having a negative effect on the content.”) with John Broughton’s “Wikipedia: The Missing Manual” 121 (2008) (“Vandalism—the destruction of content or the addition of useless or malicious content.”).