the best way to track them could be to have an exchange, at that point every action of anyone using it is trackable, in any case, if they use something like monero too
Hackers or scamers won't be stupid to use the exchange to dump the stolen coins. LOL
it's not easy to sell a great amount like the ones from the hacker of bitstamp, outside of an exchange, and Burst was caught doing something like this, so if you think that you are safe, by selling it in real life you're wrong