Burning the skin of a grapefruit with a laser may be ok, but here are some questions:
1) With the laser burns, it may be possible to cover up blemishes or signs of mold or rot on the skin of a fruit.
2) What happens with apples, potatoes, carrots, pears, and other fruits and vegetables where its good to eat the skin? I don't want some artificial chemical imprinted into the skins that I would normally eat.
I always know a label is there, I know to take it off. For fruits and vegetables with skins that are supposed to removed, the label is not a problem because I peel off the skin.
So this technology does not really solve anything, and it becomes an inconvenience.