The people that are truly afraid of GSDs will spot them a mile away, and do what it takes to avoid them. One of my neighbors is like this - because he was bitten a thousand years ago, so now he hates them all, lol. Whatever. The people who actually say things are just crabby idiots, and it's a waste of breath to speak to them. The one thing that's fun to do is to learn a phrase in another language, so they'll stop talking to you.