Tempel of Doom?

In case you didn't know, NASA/JPL plans on crashing an object into Comet Tempel 1 July 4th 2005, to take pictures of what happens:

Deep Impact will be the first mission to make a spectacular, football-stadium-sized crater, seven to 15 stories deep, into the speeding comet. Dramatic images from both the flyby spacecraft and the impactor will be sent back to distant Earth as data in near-realtime. These first-ever views deep beneath a comet's surface, and additional scientific measurements will provide clues to the formation of the solar system. Amateur astronomers will combine efforts with astronomers at larger telescopes to offer the public an earth-based look at this incredible July 2005 encounter with a comet.

Wouldn't it be ironic if the collision alters the comet's course such that it one day crashes into Earth or the Moon. Remember, this event is sponsored by the same people who couldn't avert a catastrophe resulting from a collision between a shuttle and a two-pound wedge of foam.