There's a particular spot in Hell reserved for movie reviewers who wreck the reveal.
The case that stands out most prominently in my mind was a jerk who was reviewing Ghostbusters and had to go and mention the StayPuft Marshmallow Man.
Almost as unforgivable is the review I accidentally caught this morning on network TV which pretty much retold the entire plot of Shrek 2.
Netiquette requires spoiler alerts. Can't we expect the same courtesy from movie reviewers?