Bittrex is also one of the few exchangers that never ask or give any notice to it's clients if they want to get verified or not.
Instead they take a decision by themselves and "disable" clients accounts.
I read a lot about this complaint and sure is, turning off or disabling an account without notice and worst is without explanation will really turn away users and look for another trading platform. KYC is a big issue to everyone but I guess all exchanges will go to that direction. They may not implement it now but sooner or later they will.