You are on candid camera. It may sound creepy, but it's a fact of modern life. Every person in a city is photographed an estimated 75 times a day by surveillance cameras.
When you walk out of your house, home security cameras may snap you. When you stop for gas or a toll booth, there are two more images. When you go to a coffee shop before work, then park in a garage, enter the lobby of your work, take an elevator, that's three more. When you go to the bank, pharmacy, restaurant, convenience store, tally up four more. And that doesn't include other errands!
With 210 million surveillance cameras worldwide, why not say hello? August 16 was the day to show off in front of the watchers since it was International Wave at Surveillance Day. Of course, some passersby may think it's weird that you are walking around waving, but the snoops will know and that's what counts.