Is it normal to make my neighbor think her dog is in danger

my neighbors across the driveway from me put their dogs in the yard to do their business. the dogs names are penny and missy.last week i was looking out the window and this awesome idea came to me. i took newspapers and cut out letter to make a ransom note "say goodbye to penny". later that night i put the note in an envelope and taped it to their front door. i also put leftover food in a container and stuck a nametag on it "penny". there was nothing harmful in the food so the dog would not be hurt if it ate it. but because of the note on the door, the owners think it was poisonous. lol. i did this because i get an unexplainable euphoric feeling to watch the owners rush to grab the food i left there before the dog could get to it. they were looking all around in fear that someone was going to hurt the dog. i cant explain the rush i got from doing this. im not done. im going to put more little scraps of food in a place that the dog can get to before them so they can see the dog eat it and i can watch them try to make it spit it out but it will be too late. then they will scold the dog for eating it. omg i cant wait to see the fear on their faces. does anyone or has anyone done anything like this too?