I'm not sure the word "spy" is the correct terminology. How about " the sharing of one's lifestyle to enhance the psychological well-being of others". That sounds better doesn't it?

According to a new Harris Interactive survey conducted with over 2,300 people, 50 percent of American adults have no problem whipping out the smartphone to take secret videos of unsuspecting people. While this doesn’t mean that all respondents have come across an opportunity to spy on someone, they did list several scenarios that would cause them to hit the record button. The most popular response at 23 percent was recording people in embarrassing outfits, perhaps to upload a silly compilation on YouTube. Fifteen percent of mean-spirited survey takers would use the video function to record someone tripping and falling.