jscroft - 3:52 pm on Apr 23, 2007 (gmt 0)
I could see preventing an advertiser from bidding on trademarked keywords. What I can't see, though, is forcing all advertisers to add all trademarked terms to their exclusion lists, which is the only thing that would prevent an ad from showing up on a search including a trademarked term. Whatever we may think about the advisability of that kind of stricture, it seems obvious that it would have to be imposed at the network level (i.e. by Google) than by the individual advertiser.