Originally Posted by
DrIsotope
First, the point where that clamp sits is a thick tube with a thicker tube inside of it. Second, if you think you risk putting a dent there, you need to reconsider both your choice of clamp, and your operation of said clamp.
On a round tube, then sure. On an odd shaped or thin walled tube, I wouldn't do it. Seat posts are easily and relatively cheaply replaced. Frame tubes not so much.