Or teams of lawyers, actually. An article in Monday's NY Times examines how Levis is mounting an aggressive legal campaign against its competitors whose rear pocket stitiching too closely resembles Levis' own. It's not really clear if the competitors are actually infringing, since it sounds as though few claims have even gotten so far as to be examined by a court, and Levis' claims against designer/boutique jeans companies are by and large being settled (and in some cases, at least, for quite small amounts).
Although I imagine that most everyone buying a pair of jeans, even fancy jeans, has at least heard of the Levis brand, it would be interesting to know if any of the alleged infringement (back-pocket stitching that includes two arcs, or fabric tag on left side of the right rear pocket) has caused customer confusion. Are there many people out there buying $200 Von Dutch or Lucky Jeans who think they're getting a pair of Levis?