this address stole 680 eth from a fake presale https://etherscan.io/address/0x56922c7dbfb5781617d0624c3f4fea5e6a7d4d77
There even much worse ones like the multi-sig hack. https://etherscan.io/address/0xb3764761e297d6f121e79c32a65829cd1ddb4d32
is there a way to block incoming and outgoing tx for such addresses. What is the feasibility and likelihood of this ever happening. Would it require the soourcecode be changed. I read that if the majority of miners agree to it, it can be done. But it hurts fungabiltiy of currency.