I am creating a website although during a trial run with a couple of friends they uncovered a bit of a major issue.... the ability to spam.
I have added a hidden box e.t.c. to attempt to prevent bots from spamming but my friends where able to post twenty messages in about one minute which obviously isn't good.
I am not entirely sure where this would go as it is a general sort of thread to do with Web Design so I placed it here.
Does anyone have any ideas on how I can either restrict the number of posts someone can send per minute (all forums require a login but the 'Contact Form' doesn't) or any other method I could use?