Pretty much exactly why I would want them. I'm a prankster, so I love to scare the shiat out of people. It's a good laugh for everyone. And if you don't enjoy a bit of harmless random fun, get off the earth.
There's better ways to get a laugh. It's cruel, it's anti-social and it will damage innocent people's hearing. If you don't like my opinion too ****ing bad. Keep your puerile, country-hick *** out of the city.