Ya, cuz you know, the mountain doesn't have to pay for those rental poles or anything. And when shit gets stolen, it doesn't result in higher lift ticket prices or anything. Or maybe higher food prices. Or whatever they wanna do to get their money back directly from the consumer. Think of what happens if many people start stealing rental poles, and some jackasses think "hey, I need skis, rental skis don't belong to anybody, so stealing them is OK too, seeing as how stealing rental poles is cool."
Basically, every single person on the hill is paying for those poles, at least 3X over, thanks to all the jackasses like you who think stealing from the mountain is "OK".
Good job, you're not only stealing from the mountain, and from the person who rented the poles and other assorted gear, but everyone else who skis at that hill, thanks to the resulting higher prices for stuff due to a need to replace rental equipment.