"On the eve of the RSA security conference, there's a showdown in the offing between 'Old Europe' and U.S. search operators. Earlier today word leaked about a European regulatory plan to press search engine providers to dump personal search data after six months.This seems just a little paranoid, but the European Community has been more concerned with the appearance of privacy that we here in the US. Considering what is logged by ISPs and web hosting services, the sorts of information Google maintains is trivial, by comparison.
Barring the unforeseen, it's likely the European Commission will look kindly upon the plan. This would be quite a big deal, setting the stage for a continent-wide challenge to the way big search engine companies set procedures handling log deletion and browser cookies. ..."
Another thing to consider is that the dynamic addresses provided by ISPs to the majority of users change on a fairly regular basis. Making the connection between a user and his/her activity on the web requires access not only to web server logs, but ISP data on who had a given dynamic address assigned at a particular time -- and I suspect a court order as well.