Under the Filter

An ingenious way to filter spammers through your Web form

Wednesday, October 17th, 2007 @ 7:08 am | Tips and techniques

Here’s a link to a page that teaches a new way to help you filter the spammers to post through your web forms.

It simply use a CSS technique that hides a field, and basically, bots don’t see CSS, so if the field’s not empty, it’s a spammer.

Just take a look at it! I think it’s worth it.

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Jonathan Says:
January 23rd, 2008 at 5:08 pm
Probably a little foolish, security by obscurity. If your browser can see it, a bot can see it - it’s just a matter of time (if some don’t already), before they add the trivial amount of code to do so.

For example, by using the IE or Mozilla engine APIs in your bot, you can literally programmatically render content exactly like an end-user would see it.