Bottom Brackets are a disposable part. The only reason Trek offered the hollow screw is to keep people from drilling a hole in the BB shell possibly jeopardizing the integrity of the carbon frame. You're making a Federal case out of NOTHING. Your beef is with Shimano not Trek as it was the Shimano component over which Trek has no direct control that is the problem. Your LBS should replace the BB for you then deal with Shimano I know from personal experience that this is not at all uncommon to do.