First time accepted submitter fyngyrz writes "Lousiana has passed a law that says people may no longer use cash for second hand transactions. The idea is to make all transactions traceable, thus foiling copper theft, etc. This move has profound implications that range from constitutional rights to Bitcoin, Craigslist and so forth; I wonder if there are any Slashdotters at all that support such a move." On the list of exceptions: people who deal in used goods or "junk" less frequently than once per month, and (drumroll, please) pawn shops. That means a pretty big chunk of the population who post in online classified ads in Louisiana are probably already in violation.