NO REPLAY ATTACK VULNERABILITY ON POLONIEX
One of the biggest points of confusion revolves around the so-called “replay attacks”, which is an issue that should have been addressed by ETH developers months ago. Unlike the Ethereum developers, Poloniex made sure they separated ETH and ETC as best they could, resulting in the failure of replay attacks. Every address used on the Poloniex exchange exists on only one of the two blockchains.
On the Ethereum blockchain, however, ETH and ETC are still linked together. The developers assumed ETC would lose traction, while the opposite has happened over the past few days. As a result, ETH will need to implement another hard fork to rectify this sloppy coding by the developers. Never make assumptions in the world of cryptocurrency, they will come to haunt you.