I hate overclocking. But then again, I think once you buy a CPU you should be able to whatever the hell you like with it - play badminton with it, use it to cauterise wounds (especially useful for x86), or just sellotape it to your forehead and randomly scream at passers by.
But then again, as Tickle said, some vendors do overclock chips as standard, so stopping that can't be a bad thing.
But in hindsight - it's x86 so who really cares? :-)