Ok!... but what if the guy out on the sidewalk in front of your house has his back to your house the whole time and isn't paying any attention to you or your family? Let's say he's taking pictures, collecting samples and studing a type of Ant in the gutter that connects the sidewalk to the road. Sure, you'll go out there and ask him what he's doing... but what are you going to say when he tells you exactly what he's doing?
Also, who in their right mind would be prancing around outside in the nude in freezing weather with snow and ice all around? That would be a real good way to lose very valuable body parts to frostbite! The naked guy on the snowmobile sounds a little far-fetched to me, but I guess it could happen.