Well, I don't know exactly how much policing of this kind exchanges generally do, but these coins in particular were very closely watched and would not have gon

Well, I don't know exactly how much policing of this kind exchanges generally do, but these coins in particular were very closely watched and would not have gone unnoticed, wherever they ended up. Bitcoins are 100% traceable, and when these coins were moved yesterday it was instantly posted on many news sites, before today's announcement that it was actually a seizure by law enforcement. My guess is that almost all exchanges would flag any account that deposited coins from a list of known tainted addresses like this one, and either immediately freeze it or prevent withdrawals. And any exchange that didn't do it automatically would do it manually after it hit the news.