incrediBILL - 8:09 pm on Jun 13, 2012 (gmt 0)
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.
I've ROTFLMAO and I can't get up.
But you are correct, the scrapers can be messed with in all sorts of fun ways.
I put data tracking bugs in the content so I can track where the scrapers post their content and connect the dots of scraper and destination. This can be slightly challenging with some that scramble the output or blend it with other content.
Another interesting thing you can do if you want to trash a scraper is just spew out pages of profanity that will stop their output from being displayed to anyone with SafeSearch enabled.