Share 'Reviews that Aren't Reviews'

Anyone else get cheesed about this or is it just me? People who post reviews about movies that haven't been released yet. I understand that most films are pre-screened but there are quite often reviews that say things like "I haven't seen this film yet, but the trailer looks great." or my favorite " I read the book and they'd better not screw this one up." An example - there's a review up for Sp…