Lawyers never sleep. The Chicago Tribune reported a couple of weeks ago on a class-action suit just filed in Cook County Circuit Court against Colgate-Palmolive, drugstore chain Walgreen Co., the American Dental Association, and assorted other defendants. The charge: failure to warn consumers of the risk that vigorous brushing might cause "toothbrush related injury" to gums. The plaintiffs are seeking warning labels on toothbrush boxes. Just in case you need something else to worry about.