Poloniex is answerable to the gov't. They are too entwined. The operators would literally have to skip town since they are more or less on the grid. My problem with them is that they were hacked in the past and their compensation didn't seem all that great. But cryptos were still new and they've shown a good track record for the past year or so.

I want to believe Cryptopia is in the same boat, but the way they handle support and the problems their trading platform has are more than just a little problematic, they border on criminal behavior. If they were based in the U.S. there would be some legal backlash already.