Bitcoin Hacks

[Nesa]

Hello

I'm new to bitcoin and don't understand the sending fully, but couldn't the exchanges somehow block people signing up or registering with hacked BTC addresses.
Can the exchanges check what address the bitcoins are sent from to that users account on the exchange and suspend the user? or is this too much work.

I know they would need a list of some kind, but something like a block list might help like spamcop or Spamhaus run.
Just an idea don't know how well it will work though again a newbie on how sending works.

[cooldgamer]

There are plenty of coin mixing services out there, where they will give you 'clean' coins in exchange for ones you send, minus a 1% fee or so.  Even without those, after a few transactions it gets hard to track specific Bitcoins manually, much less an automated system to do it. 

[Nesa]

Thanks for the info cooldgamer, I forgot about the mixing services so a block would be useless.