It looks like they are in an urgent need of ready money, and locking accounts worthy of thousands of dollars seems to be one of the ways to provide the required liquidity to themselves. I think they will return you your money in the end, but it may take some time. It is strange though that you continued to hold the money at Bitfinex after the hack. The writing was in big red capital letters across the wall.
That might be the case. Horrible if it is. Hopefully they will return all my assets. But I somehow have a strange feeling they won't and they will keep sending more and more questions. We will see, hehe.
You are right. But prior to the hack, Bitfinex had never disappointed. Always worked 110% flawless. And that's for a few years of time which I find quite amazing. Fast response time, quick deposit & withdrawal, awesome features in the trading engine etc. After the hack I really thought they will never have any problems again. Since it will only hurt their credibility they are slowly building up again.
This was for sure a little wake-up-call for me

I don't think you could actually hope for or rely on your "rights" in this case. Let alone think if they are legal or not. That's the last thing that I would care about in your place, for the simple reason that they themselves didn't have any right to distribute losses incurred due to hack among users in the first place, since it was their fault, not their clients. After they had done this, it had become only a matter of time until they started locking accounts with money under any allegedly legitimate pretext.
That should become a true wake-up call for anyone still keeping money at Bitfinex.