Buster11, German PoWs in Canada were at one point shackled as a reprisal. They were soon able to remove the cuffs, which they melted into uselessness in their hut stoves, stoked up for the purpose...
More cuffs were sourced, which the PoWs also destroyed. Eventually the order was rescinded, mainly because the local police were getting fed up with the cost of replacing their stock of cuffs!