Karl,using my trusty metal detector I find quite a few at the beaches.The prime places to aviod are the benches at the beach and the 1st 25' or so from the tar parking lots.Summer is worse at the benches and picknic tables but that still happens in the winter.1st Encounter Beach in Eastham,Skaket in Orleans,and Herring Cove in ptwn seem to be the worst.Also,watch out for them in soda cans tossed out of vehicles too.
