Yeah, and those rocks are not smooth either. It is all volcanic rocks with jagged points everywhere. If you look at the popular areas that fisherman gather you will see holes drilled all over the place. What they do is drill a hole and insert a pvc pipe and cement it into place. There might be up to 10 holes drilled and not only holes for the rods but they have hold down ropes anchored as well so they do not loose their rigs.
They have this thing down to a science. Plus they have large bells to let them know that they have a bight on. That is inhumanity gone whild as some of the bells are huge. They are out there all night and usually fall asleep these bells will wake the dead not only someone from a deep sleep.
Happy Catching
Paul