I don't think it was ever appropriate to use a child in a caricature against his father.
This is one of the worst examples I have come across.
There are many English cartoons that poke fun of Napoleon, Josephine and the entire time period. I know they were considered funny at the time. But this one is just bad.
This is Napoleon Jr. (Big Head) with a rope.
The caption reads "C'est le cravate a papa."
This is Dad's tie.
Very poor taste indeed.
Cartoonists everywhere should be embarrassed.