leashes for everyone

Hunde sind an der Leine zu führen = Dogs have to be held on a leash

There are some harnesses and leashes for children, as used this sample video: Phillip the Hyper Hypo. It's obvious that the city employee in charge of finding a spot to hang these signs had a ball when he spotted this perfect opportunity.

I haven't seen kids on leashes in Munich. Could it mean that parents are breaking the law?

N.-