I think the dire warnings apply to hooking up an Apple II 5.25" drive to a Mac. That combination apparently will usually cook either the drive or the IWM chip, or both.

As for your situation, again, the most serious problem you might encounter is related to feeding -12V to the superdrive. Some models have no connection there, so there isn't a problem. However, drives from some later runs reused this pin for other purposes. Connecting -12 to this pin causes the eject motor to spin continuously, and may damage something if connected too long. I've never had this happen to me, but maybe that's because I immediately shut things down as soon as I hear it go on.