Technically speaking, this is a good move on the part of Bittrex. I mean requiring identification only further legitimizes their business.
If you read up on the numerous recent threads there are more than enough fully verified people in non evil countries who've been locked out of their accounts too.
Normally I'd assume that the whiners were incompetent or dishonest, but there are so many of them coming from so many different channels that it's clear something very abnormal is going on.
your country should not matter when you already had an account and were trading and also depositing and also withdrawing fine! and doing all that for years.
if they changed their mind about their rules it is not the users' fault, their accounts should not be banned nor closed, they should have been given a warning so that they could withdraw and leave bittrex! and the rest who were fine with the "new rules" stuck around.