@beth ann: The real problem are not those few peop...

@beth ann: The real problem are not those few people knowing how to fake referrers in their browsers... the real problem arises from people writing own bots which always supplys a google referrer trying to steal the content of my site. As long as there is no 100% working way to tell if someone did really a search on searchengineXY or is just supplying a google.com?q=asdfasdf referrer, I will not implement this. I can check if someone claiming googlebot is really googlebot with dns lookups, but currently their is no way to check the referrer for authenticity and thats the big problem.

My feelings on this "service" are mixed, but I've ...

My feelings on this "service" are mixed, but I've got one simple question for the naysayers: How many *regular* people really know how to fake a referrer? Many of the Joe Searchers I know can't figure out the difference between the address box and the Google search box. A few of them might be able to figure out that an advanced search could let them see more content for free, but most people I know aren't that industrious.