since you pmed me with this thread I assume you know about my past issue with poloniex , yeah they don't respect their customers and they don't respect their TOS
they suddenly decided to stop accepting traders from my country without any warning , I ended getting my money stuck there for over two months waiting for them to reply
but they paid me after ignoring me for a little bit over 2 months , same thing happened with all the Syrians I know

the shadiest exchange at the moment is bittrex since they are still holding Syrians funds without paying them or even responding to their tickets