I don't know much about the inner workings of bitcoin, but they know what wallet the stolen coins went into and where they went from there. Is it impossible to black-list the tainted coins/wallets? If every single transaction is in a ledger, then wouldn't every single coin be traceable?
Yep stick to your day job, blockchain aint for you son!!
Despite the disturbing news, this comment totally made my day!
P.S. the bitcoin network charges a transaction fee, this is not based on a percentage of the amount sent. Free lesson, Enjoy!