A Halloween prank being played out by PC World Online is receiving mixed reviews, including criticism that messages promising to unleash viruses on end users' computers go too far, the Associated Press is reporting. The magazine told the AP that the spoof, accessed by clicking on a link titled Spooks, Pranks, and Java Jokes, is all in good fun. But some Netizens say the joke is akin to shouting "fire" in a crowded theater.