I always whistle, because people tell me it attracts sheidim.
So when you are camping in the wilderness, you are always a bit wary of bears during the night, and that’s why you don’t keep any food or smelly stuff in your tent.
But there are always funny noises during the night, that sound like footsteps near your tent, or rustling in the bushes. So I just tell myself it is probably a sheid and go back to sleep.