In the most presumptive, racist, the-media-made-Cho-do-it article imaginable (registration required), the Washington Post's Stephen (revoke that Pulitzer!) Hunter notes that Oldboy features violence and revenge, and that both director Park Chan Wook and Cho come from Korea. Coincidence? Hunter thinks not!
Except then Hunter, digging deep, remembers that Cho used a gun, and Oldboy's Old Dae Su's didn't. So, he concludes, John Woo -- also Asian, see the connection? -- should share some guilt for the massacre at Virginia Tech.
It's unlikely, but not impossible, that Cho watched Park's films. Oldboy remained on the edge of even arthouse fans' consciousness. Despite winning Cannes, the film did just $700,000 in American box office, playing, at its widest, on 28 screens. It's also highly probable that Cho watched any number of ultraviolent movies from Hollywood, which, if you care to drive the media-as-killer route, would have to rank first in polluting the world's minds.
The New York Times' A.O. Scott wrote a sensible, if too polite, response (registration required) to Hunter's idiocy.