I always think it's a terrible waste of a (useable size / interface) drive to destroy it, even if there is stuff on there you might not want read by the casual interested tech (even, let alone a straight user). [1]
ITRW, a good dose of DBAN and an install if Linux or somesuch is good enough to do all that's required and you still have something useable.
Even if you don't want it, you might find they are still used in other kit and people will pay good beer tokens for it. (I sold a small batch of old SCSI drives that way).
You can buy coasters very cheaply and they don't have a big hole in the middle. ;-)
Cheers, T i m
[1] A mate, thinking he was doing the right thing, took the drive out of one of the old PC's I had built him and tried to burn it (in a bonfire with other stuff) but it didn't burn very well (surprise surprise). Not long after he needed a new drive himself and had to buy one (and the one he burnt was perfectly suitable). That's what happens when people who don't know get advise from people who know even less (as I think he did in this case). ;-(