Insist players cannot use their nice dice as it might damage your lovely table, board or map, and insist they use dice made from folded paper cut-outs instead.
Shoes like these wind up at Goodwill because the person was honest with themselves: They simply couldn’t handle the power of flamingo-toed shoes. Whoever you are, thank you for your honesty. Someone WILL come along, and it will be like pulling the sword from the stone.