Yea. That's what I'm thinking too. If you receive bitcoins from those address you're effectively doing the same as if you were collecting cash from watched boxe

Yea. That's what I'm thinking too. If you receive bitcoins from those address you're effectively doing the same as if you were collecting cash from watched boxes in a bank vault, and the cash was radio-actively tagged. (And therefore easily tracked.) Anyone handling a large quantity of those coins is suspect But if someone got their hands on them and performed a huge laundry so that everyone has tainted coin history, then you might be ok.