Hell, they break the fuckers off on rocks and trees, rather than chance ending up stuffed on some yahoo’s wall.
LOL. Moose, deer and elk shed their antlers in the winter and grow them back in the spring. If you see them in late spring/early summer the antlers look all fuzzy because they’re covered with “velvet”. They rub the velvet off on trees so by mid-summer the antlers are bare whatever-it-is-antlers-are-made-of. I believe they do also bang the loosening antlers on rocks and trees in the late fall, probably because it feels annoying to have the things wobbling around on top.
I don’t know why they shed the antlers but my assumption would be that snow falling out of trees could potentially break the antlers and wound the animals so better just to get rid of them.