Very good point, but if your clips are set correctly and you have a safety strap to the rod which you always should on any rods where the line extends off an outrigger or center rigger it will not go over. You can safely go above the rod tip height, you just do not want to go a huge amount over it on too steep of an angle where the rod can pull out. If he is using the top holders it should not be an issue, if it pulls out of them then the rod wasn't put in the holder correctly, or the line was passed through the rigger clip wrong. When rods are pulled from holders from center riggers it is typically on a setup where the center rigger is set about a rod length above the rod tip, if your angle will put the tip of the rigger around 6ft above the rod tip from the holder, then I would maybe reconsider the rigger angle, otherwise it is correct.