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A buddy I used to work with used to like to turn on your heater on full blast on a hot summer day or turn your radio on full volume along with the wipers on high etc. so it would scare the sh#t outta you when you got in & started it up. So one winter night I took a wrench out with me & turned the headlights on the snow plow of his blazer around so they faced the windshield. He was like WTF! He said he thought it was the guy's truck parked in front of him & he said he blew his horn 2x at him & called him an a$$h*le before he realized there was nobody there & it was his truck. We had a good laugh about it later.
Another time I got a key made for his honda odyssey at the dealer we worked at & used to park it about 3 or 4 rows across the lot from where he parked it. Did that for about a week straight! He never said anything about that though!