Those of you who have had a popular WordPress-based website in the past know too well about the threat of spammers. Most of us use services such as Akismet to filter spam from our comments. But spammers have more than one way to attack WordPress sites. They attack forms, login pages, and everything in between. As soon as you open your website to user registrations, you are going to end up with a ton of bot-generated accounts and a ton of garbage on it. SI CAPTCHA Anti-Spam is a powerful anti- spam plugin that lets you handle these types of spammers. It won’t keep everyone out but will reduce the number of headaches you have to deal with on your website.
This plugin has your comments, registration forms, lost password page, and login section covered. It adds a simple but effective CAPTCHA box to them. No CAPTCHA is unbreakable. At the same time, this approach will keep a lot of spammers away.
You can choose to hide CATPCHA from your logged in users and admins. You can also choose which forms you want to show your CAPTCHA box on. SI CAPTCHA Anti-Spam takes advantage of open source CAPTCHA library. It also has an audible CAPTCHA feature just in case your visitors want to go in that route.
This plugin is fairly easy to customize. You can always modify your form’s design by playing with CSS in the back-end. SI CAPTCHA Anti-Spam may not make your website hack proof but it makes life more difficult for spammers.