This sounds like an awfully naive question. There are many things that are technically illegal, e.g., pot that people buy frequently but would not want their pu

This sounds like an awfully naive question. There are many things that are technically illegal, e.g., pot that people buy frequently but would not want their purchases tracked. Not to mention the very common practice of buying a used car in cash but declaring the minimum allowable purchase price to the DMV to save on sales taxes. Cash is King for a reason.