What's the latest defense against comment spam submitted by BOTS into a comment form?
What's the latest easy and simple defense against comment spam? mybigdata.co.uk has a contact form and BOTS submit spam as a message. The solution will be something else than captcha as other businesses also don't use it.
If you have a huge amount of spamming IPs, Anti Spam Bee solves the problem with near zero server load, since IPs are blocked at Kernel, rather than running through the entire LAMP Stack + WordPress to do blocking.