I get a lot of sign ups on a drupal site I manage that contain the following:<p><pre><code> I am impressed, I have to say. Really rarely do I see a blog thats both informative and entertaining, and let me tell you, you have hit the nail on the head....
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The bot seems reasonably sophisticated -- it's capable of scraping arbitrarily defined fields and filling them with junk (or that comment), and it follows signup verification links; however, it doesn't seem to submit any false articles, share any URLs, and the email address often dies quickly.<p>What is the point of this type of bot? Is it scraping walled data? It seems innocuous -- a minor nuisance at most -- but I doubt that is the case.
Many sites have a comment approval policy that only hold the first comment by a user for approval. Once that user has had one comment approved manually, future comments will be automatically approved.<p>Spambots attempt to exploit this by creating likely-sounding content for a first comment, getting it approved and then spamming.