Iâ€™ve just come across an interesting project called Project Honeypot. Hereâ€™s what they have to say about themselves:
Project Honey Pot is the first and only distributed system for identifying spammers and the spambots they use to scrape addresses from your website. Using the Project Honey Pot system you can install addresses that are custom-tagged to the time and IP address of a visitor to your site. If one of these addresses begins receiving email we not only can tell that the messages are spam, but also the exact moment when the address was harvested and the IP address that gathered it.
Having some sort of defence for your website is always a great idea, a bit like getting a cover for your sofa. Iâ€™ll need to read a bit more about it before deciding whether to implement it or not, but I thought it was an interesting thing to post.