bakedjake - 1:57 pm on Jun 13, 2012 (gmt 0)
I used to give this counter-intelligence presentation at a few of the conferences.
I talked about the idea of giving your competitors false information - for example, when you know your competitors are visiting and/or scraping your site, perhaps you adjust the prices for them.
Sometimes the idea isn't to outright ban bad bots completely.
Often, bad bots are scrapers designed to republish your content.
Many bad bots and republishers aren't all that sophisticated. They will strip links from your content, but they will only do so at a very basic level (say, an exact string match for "<a href=" or so).
A theoretical tactic that you could use to leverage bad bots is to distribute content content that links back to your site. Not the same content that appears on your site.
Mind you, I would never use this tactic for any reason whatsoever, as my expansive moral code prevents me from ever manipulating search engine results for any reason at all.
It's just a theory.