Just my 2c about blacklists: As soon as they are a reality bitcoin will be dead.
Money needs to be fungible, everything else is nonsense.
Even if money (BTC, etc.) is stolen at gunpoint? Blacklisting stolen money is a marvelous idea.
To prepare for a potential life-threatening situation, one could have some money readily available but more not readily available. The thief wants your fungible money; killing you is not their top priority. Accessing your safe money should put your assailant at risk of capture.
that would mean that if you get btc from someone which are stolen from someone else that you would have to give it back to the original owner.
under that circumstances i'd never accept btc, because where should i know from that they are not stolen?
^ thats the reason why it is important that money is fungible
(for the people arguing about miner blacklists: by whom? usa? europe? russia? if every miner has a different blacklist nothing would change and any transaction would go through someday. if its a client-side blacklist which refuse blocks we will have country-specific forks)