Comment spam has been on the rise lately, and I’ve been deploying anti-spam software on the blogs to counteract the recent increase in spam activity.
Akismet is a great tool, sorting out 99.8% of the comment spam I’ve received in the last couple of months with very few errors. Available as a plug-in to WordPress, and for many other systems, it has certainly reduced the burden of manually moderating every comment I receive.
But, I’ve enjoyed a couple of entirely spam-free days courtesy of WordPress Hashcash. This plug-in silently causes the visiting browser to perform a small computation that fails on some of the software used by comment spammers. I had to hack on it a little to force it to work on the photoblog, but otherwise it’s a great tool. I’m currently running Hashcash with Akismet still lurking in the shadows as backup.
I’m sure that spammers will eventually catch on; but minimally, Hashcash is going to slow them down. And, for the time being, I’m seeing zero comment spam!
Give Akismet and Hashcash a try, and let me know what you think.