I don't have a kid (yet), and I started to write out my plan, but then I changed it. Now it I'm thinking about this: Treat them like you would treat a beggar

I don't have a kid (yet), and I started to write out my plan, but then I changed it. Now it I'm thinking about this: Treat them like you would treat a beggar or salesperson you don't want to interact with, say "No thanks" with minimal eye contact and keep moving (or if stationary, ignore them).