Spam

Form spam is an unfortunate fact of life for most websites nowadays.

Many people use some form of Captcha to limit this – Google reCAPCTHA (the best in my opinion) is now integrated with CF7.

Another approach is to use a Honeypot method which tends to very effective against Bots. Again there are a host plugins available to do this – see https://www.ads-software.com/plugins/search.php?q=honeypot