By the time you get to see the fourth incarnation of any movie franchise, you should be pretty sure what you're in for %u2013 and this one is true to its brand. It's corny, mischievous and more than a tad tacky in places.
The even numbers don't favor the Scary Movie franchise. Inspiration ran dry for the Wayans Brothers in No. 2; now successors David Zucker & Co suffer gag fatigue following up their moderately improving efforts on the third installment.