[celticninja]

The blockchain is public, the source of the coins can be tracked, not to an individual, but if they were 'tainted' coins e.g from a known silk road wallet, or from a major hack we would already know. Even if they were tumbled or rinsed through alt coins it would throw up some flags based on the transactions that fed into the main wallet address(es), and you can bet people have trawled through the transaction history of the pineapple fund wallets by now.