My plan for when my daughter gets to this age:
1)Buy human silhouette paper target
2)From about four feet away, shoot tight group in forehead, tight group in crotch
3)Write "150 Yards" on silhouette
4)Hang silhouette in office
4)When kid comes to pick up daughter, bring him to office to show him my gun collection, see if he notices silhouette...........
Did something like this with my younger daughter. It properly impressed the slime ball, although he still came within a hair's breadth of being the next silhouette target, and the not so bad guy. The third guy thought it was cool. He's her husband now. :) He and the other son-in-law, (father of the amazing Miss V, who turned one yesterday) and I now occasionally go shooting together.
These things often work out quite well.