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Fight against Comment Spam in WordPress

2006-11-06 2014-02-26

As some might have noticed, this blog was down for several hours/days in the last few weeks.
The reason for this was COMMENT SPAM.
In the beginning (around 6 months ago) I thought on getting along with it without countermeasure. But spam rose to a climax of about 30 per day. I’ve received somewhat 1000 unsolicited comments, only two of them were published – by accident. This is due to the very well-done comment-handling tools in WordPress. But I like to know what people are writing on my site, so I am getting an e-mail whenever a comment needs approvement. So it got an unbearable situation.

Solutions: Turing-Test, collaborative fight?!

  • The first solution, that came into my mind was CAPTCHA. I don’t wan’t to explain the whole story of Captchas, as there’s for example a comprehensive article on Captchas in Wikipedia.
    In short it’s a Turing-Test. There are disadvantages:
    1. Rather complicated to implement.
    2. Many captcha implementations are inefficient and do not protect against programs, as Sam Hocevar explains on his website.
    3. Many are inaccessible or even more complicated to implement
    4. There are even other ways to go around captchas, as marvellous Cory Doctorow already has posted in his blog entry “Solving and creating captchas with free porn” in 2004

    I haven’t tried a captcha.

    to be continued…

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