Since I run 19x8.5(f) and 19x9.5®, tire rotation means dismounting tires and switching L - R, and not F - B. The dismount is necessary since the tread is uni-directional; I can't just switch the left wheel with the right. Major pain in the arse, time consuming and of course, not free And what's worse is that I'm lowered 2.5" and can only align so much; it's not really the camber that kills me, but the toe-in/out that causes the most wear.
These days, I just run the tires into the ground. Kind of sucks when buying new tires and I look at the tread pattern- The inside shoulders get well worn, but the outside shoulders still have some good tread left. Speaking of which, I either need to get new tires or trade the car in... I'm due.