I usually leave mine unlocked and the windows down but I can always see it. I don’t mind people looking in it especially if it brings back memories for them. One night I took my parents out to a restaurant on the water when I first moved out by them. An overweight little s@&t decided he wanted to sit behind the car and start stacking rocks above the bumper and bang on it like it was a drum. I walked over and told him to get away from the car. His mother didn’t notice as she was busy looking at her phone with the rest of her group but one of the men in the group did and him and the rest of his buddies just gave me dirty looks the rest of the night.