Reducing SPAM links on wordpress blog comments–remove url in form

On my main wordpress blog I run Akismet to detect SPAM comments. This is the first line of defence

Next I also run WordPress HashCash which forces commenters to be running javascript on the web page before they can leave a comment. The JS requires a sum to be calculated, and if it doesn’t match the required value you know that it is likely that it isn’t a human using a web browser trying to leave a comment. Probably it is a spammer doing bulk POST request to sites all over the net.

Lately this regime has been letting a few through each day.

This is unusual, but shows that spammers are now willing to pay real humans to sit down and leave comments on blogs.

So the next step I’m trying now is to remove the URL from the comment form. This will make it harder to leave a web address in the usual way. They can still POST this field, but only from a hacked browser or javascript aware bot.

It killed spam comments dead for the last few days. So far so good.

My web site visitors (not here, the self hosted one that I haven’t linked to) tend to be not be computer enthusiasts, so don’t have their own blog to legitimately link to, so I don’t think they will care.

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Reducing SPAM links on wordpress blog comments–remove url in form

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