Blocking Spam - It’s Not Rocket Science

There are a number of ways to block spam. If you have a blog, you’ve probably tried a few. If you’ve ever commented on a blog, you’ve probably seen a few in use.
I’ve been using Akismet since I started blogging, and I’ve been happy with it. But there are other ways. Captcha images, math plugins, questions, and more.
For now it’s “Is fire hot or cold?” and “What is the sum of 7 and 4?” but who knows what the future holds. Someone out there is probably working on an anti-spam plugin that requires you to solve physics and/or calculus equations!
Before you can comment, we have to make sure you are qualified as a rocket scientist. Just answer this simple question and your comment will be approved:
What is the cosine of an ultraviolet wave traveling at a velocity of 27 kilojoules with a frequency of 3, as it extends perpendicular to the angle of inference, in an isotonic solution?
While the grad students go try to figure that out, let’s look at what the people with street smarts are doing: WP-SpamFree
It’s simple. Few spam bots can process JavaScript, and few can process cookies. Ever fewer can process both. However, 99% of your visitors will have no problems with either JavaScript or cookies.
So they made a plugin that uses JavaScript and cookies to block the bots while avoiding the need for captchas and math questions. It’s not rocket science - it’s better than rocket science. I prefer to use the term practical.
I’ve been using it for a week or so and it has blocked 100% of comment spam, giving Akismet a well-deserved vacation! The only thing that has made it past WP-SpamFree was trackback spam, but Akismet caught that with no problem.
WP-SpamFree gets Sucker’s Seal of Approval!
Photo credit: IRRI Images


Posted January 29, 2008
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