Glitch, or conspiracy? As much as we'd like to point to the latter, Amazon tells us it was nothing more than a "site glitch." Says Amazon: "Amazon did not knowingly or consciously choose to remove the reviews. The team is working on resolving this issue now and restoring all the reviews on the site.
"Per our policy, Amazon doesn't censor or edit customer reviews and we'd only remove a review if it fell outside our guidelines." Regardless, we hope Spore publisher EA has heard the angry cries of legitimate game owners entangled in an anti-piracy net.
[Thanks to everyone who panicked and sent this in!]