Maybe you don’t want your customers to be able to review your products. Maybe you’re sick of the truckloads of spam that you automatically subscribe to just because you have the Review functionality turned on. Truth is, nobody ever leaves reviews at my store anyways, so I see it as another distraction between a conversion than a confidence builder.
Regardless, reasons, lets figure out how to disable the review functionality on Magento so that we don’t have to worry about it anymore.
Follow along. This one gets really complicated … 
How To Disable Magento Review Functionality
System > Configuration > Advanced > Advanced > Mage_Review > Disable > Save Config.
So, there ya have it! An extremely simple way to turn off the Magento review feature.
Be sure to clear your cache, and you should be all set!
Refresh your product page, and you should no longer see the option to leave a review.
Written For Magento Version
This tutorial was written for Magento Version 1.6.1.0.
About Jeremy Blake