Maybe an e-collar for your Dad, hahaha. Dad's are like Husbands, impossible to train!My father loves to tease Sutter Cain when we're leaving and he has his head out of the window. He's just playing, but sometimes my boy barks quite viciously at people passing by now and I wonder if it's related. Thankfully he stops when I ask him to (my dog, not my dad. I've asked dad to stop but I may as well ask a goldfish to fly for all the good it does)
For reasons I don't feel the need to explain, my father can not be avoided. Him teasing my boy can only be minimized, not avoided. So it is with my original topic, exposure to children, well behaved or not, can only be minimized, not avoided. The harness is a good idea and I may have to look for something similar.