Are pull tabs from coke cans etc. still a big problem? Back when I was using my Whites quite a bit, those pull tabs were really hard to tell from a coin. Maybe they have all corroded by now.
LOL. Unfortunately they have not all corroded and if you want to find gold rings and chains then you have to dig thousands of them since to a detector a gold ring and a pulltab look the same. Coins are much higher on the conductivity scale and modern detectors are pretty good at telling the difference.