Love these stories!
I'm shameless -- anyone who looks even remotely interested, I'll stop, talk to them, try to coax them into sitting in the car, going for a quick ride with me, sometimes even driving the car. (I usually snap a picture of the person's driver's license.)
I am absolutely convinced that these conversations make a difference. They change perceptions from "rich man's folly" to "awesome and someday I could have one".
I have never, not once, had a problem or even a scary moment. Not saying you should be stupid about doing something like this -- 1 in the morning in a deserted parking lot is different than noon on a city street -- but so far what I'm seeing is that people who actually notice the car are pretty much by definition people who can be approached and who welcome the interaction.
There ARE people who turn out not to be that interested, and that's just the way it is.
Finally, when you are talking to people, whether it's aggressively like I do or just in casual conversation at a cocktail party, try to let them know that not only is the Model 3 coming, at $35K, but also that Tesla is working on a PICKUP TRUCK and a SEMI and already has an SUV. Tesla is knocking down use case after use case. I talk to plenty of people who can't trade their pickup truck for a Model S because the pickup truck is used in a different way. So letting people now that there is a pickup truck in the work also changes their perceptions. ("Not just for spoiled city folk environmentalists. Also for people who need to get a job done.")
Alan