I think Bittrex is US based and I suspect the real reason for Poloniex's actions is the fact it is US based and worried about trouble from the government. Bittrex might eventually get worried enough to go down the same route, or be forced to.
My thoughts on Poloniex's move is that they were forced to. I can't see any good reason for them to decide to do this on their own, and implement in 48 hours at that. If it was their decision, I would think they would give a bit more notice that that.
I agree. I just wish they explained why they are taking this action. For those who haven't seen it, there are three verification levels:
1. Provide name/nationality.
2. Provide mail address and phone #.
3. Provide passport/social security # (and I forget, maybe something else).
I only did the level 1 and there seems to be no verification that the info is real, at this point.
What do you get for level two? It sounds quite reasonable. Can I buy shitcoins with my fiat? It's about damn time I get all this stuff without some serious taxes...