Arrowhead
Have you ever been arrowhead hunting? Strange sport. A quick Google search turns up a rabbit hole of resources which, if followed, would lead you to some online forums chock-full of some of the strangest people you've ever met. While there are certainly worse things you could be spending your time doing online, we suggest wearing this shirt, first, just to see how it goes. If approached by someone talking excitedly about arrowhead hunting, best to keep the weirdo in front of you and your hands on a blunt object.