Can't you just hide the "Post Review" link in the CSS and so members will have to look elsewhere?
Unfortunately not, it isn't a straight forward thing to do. Even if that were possible we'd then get 100's of posts / PMs asking why reviews were no longer allowed on a review site. You just can't win.
It's a known issue, there's a stickie on the main forum, there's posts in just about every area, the answer is #1 in the list of search results, all people have to do is look.
Nobody seems to want to look around the site, they just want to come on and be spoon fed the information they need. Another stickie on the main board is the punting wiki, if they bothered to read that the would find -
Before you start asking questions on UKPunting it is advisable to invest some time in reading through the forums relevant to your area, and this wiki. UKPunting is split into Discussion and Reviews boards by regions of the UK. Hopefully this wiki and the forums will contain most of the answers to your questions already.