What you do, in this case, is rent a car, and build a bomb. Why, you might ask? Well, good question. Put that bomb in the trunk (for bomb building tips, try Google). Then, drive the rental car to your commish's house/apartment. (oh yeah, make sure you get the insurance for the car, it is stupid not to) Drive said rental car right into the front door of said commish, preferably while he/she is home. Jump out of the car and run like hell, or a cheetah (they are fast, or so I have heard). Detonate the bomb (for instructions on building a detonator, try Google).
Problem solved, no more douche to deal with. Threaten other league members to have you become commish.