Bob Jones University constantly tinkers (anonymously...or so they thought) with the BJU article at Wikipedia. Some edits are legitimate corrections or clarifications. But a large percentage of their edits would count as "vandalism":

1) Deleting factual but unpleasant information

2) Adding self-serving and spurious info -- for example, repeatedly claiming that their academic standards are equal to Harvard's or that their religious art collection is the greatest in the Western Hemisphere. (I kid you not.)

I've posted some of their most egregious edits: <link>