Add field to the reviews table for ip address and each review that is set, log the ip address. When another review if being submitting for that promoter/ venue etc check there isn't one with the same IP Address, if there is don't let the user submit another review - this will be classed as spam.
Add field to the reviews table for ip address and each review that is set, log the ip address. When another review if being submitting for that promoter/ venue etc check there isn't one with the same IP Address, if there is don't let the user submit another review - this will be classed as spam.