Good question. Four days ago, I received an email from them to the effect that:

­­...requiring all legacy Poloniex customers who have not yet completed full identity verification to do so as soon as possible.

­­We appreciate your cooperation in this process. You will not have the ability to trade, deposit or withdraw using your Poloniex account until your profile verification is complete, so please take action on this as soon as possible.

Don't even think I'm going to follow through with the process, not among my priorities.