Harry Styles is on the legal offensive to combat fake merch on the internet. In a lawsuit filed Tuesday in Chicago federal court, the pop star sued a number of online sellers for allegedly violating his intellectual property rights by selling counterfeit merchandise to unsuspecting Harry fans. Arguing that the counterfeiters use misleading tactics to make it “difficult for consumers to distinguish such stores from an authorized retailer,” attorneys for Styles want a judge to issue a sweeping court order that would, among other things, force big web platforms like Amazon and Etsy (who are not named as defendants) to…