Web forms are frequently abused by robots, even recaptcha is hacked. A robot needs only few seconds to fill the form and submit it, but a human needs much more. I'm looking for a solution to enable the "Submit" button after X seconds. In the meantime maybe the button to be a counter of remaining seconds.
There is not just one ip as it would be easily blocked in firewall. The spammer is using plenty of IPs, I think from a proxy list.
Any idea?