Homegrown Drupal 5 Webform SPAM Filtering

One of my clients started getting massive amounts of SPAM through his web form created contact form. Since this contact form is displayed as a block on ever page, I didn't want to put in an obtrusive captcha. I did try the hidden captcha module, but found that it is already automated against. I decided to hit it straight on and wrote a snippet of code to not submit, but error instead, when the body contains the http prefix.

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