It would take 5 minutes for "Tristan" to put up a notice on the poloniex website regarding the situation, and regarding deposits/withdrawls.

Why has this not yet been done to avoid this ^^^^^ frustration?

No refunds has been given for BTC deposited after the incident. I'll believe it when I see it. (Assuming that all those deposits will have been refunded and not just those of the persons who happen to post here or on http://poloniex.freshdesk.com/support/discussions/forums/1000078491 like coinmarket did to keep the con game going)