This is the rest of the joke I received with this image:
Dear Abby,
I recently read your column advising grandparents on "tough love" for
grandparents to give misbehaving grandchildren, whose own parents let
them run wild. I have followed your advice, and enclose a picture
demonstrating my technique when my grandson just won't behave while I'm babysitting for his parents. They have told me not to spank him, so I just take him for a ride, and he usually calms down afterward.
Sign me,
Tough Love Grandma