On May 2, 2017, the following will be delisted: BBR, BITS, C2, CURE, HZ, IOC, MYR, NOBL, NSR, QBK, QORA, QTL, RBY, SDC, UNITY, VOX, XMG
Do you own any of these? What are you gonna do now? Sell or withdraw to your wallets?
Don't have balance of that specified coin to be delisted on Poloniex but if that's the case, it's better to move those coins at other exchanges that have a certain wallets for them.
Specifically, due to the fact that they established a low volume @ Poloniex, continue their journey at other exchanges and expect that their volumes there will slightly bring up. If they want to dump then it's also fine.