Yeah, in my pc they spin all the time...
But I don't have to pul my pc out of a narrow slot just in front of the gear stick (which I have hit on occasion).
I'd rather not have the discs spinning down whilst I'm ripping it out of the cage (I have the problem of the front locating bumps making the unit jump when being pulled out too)

Jazz
(List 112, S/N 00030, 4 gig blue)