Another downfall of Coinbase is you can't use "bad" coins on their site or you'll be banned. I understand that they are trying to follow U.S. regulation and stay legal, but these actions go against the very nature of bitcoin. If someone wants to gamble a bit, why not let them?
Have you been affected by this? I've heard rummors about this, but then again I've heard stories about people depositing directly from darknet markets to Coinbase. I've never heard abotu someone being affected by such a supposed system checking where incoming coins are from.