I have always run loose chord and sometimes 3/4" nylon tubular webbing around the boom just to keep things neat and away from entanglement. The idea was so that if the clew needed adjustements, the foot would be able to move (such as tightening). I imagine that if it were really cranked down through the reefing cringles, that the pull would be from where the foot was attached through the cringles and this would be very bad...not only for improper sail shape, but I could see the sail possibly tearing at that point. Just curious...some feel real strong about never tying off around the boom...others have done it for years with no problems. Tomato...tomahto?