Fly the ODP unless tower gives you a different clearance. We had a crew get in trouble in TYS, a while back. Taking off 5R the ODP says something like "no turns east before 4000'. Tower told the guys "turn right 090 after departure, cleared for takeoff". They should have turned at 400' but didn't until 4000' and got in trouble. If you want to do the ODP instead of tower clearance you have to let the tower know so they can clear you for that procedure. Great question for discussion!