All the same I wouldn't deposit a poo into Bitfinex either. I would assume there might be some redress if it all went wrong. This thread is a demonstration of that not being the case with BTC-e.
Well, BTC-e repaid 55-60% of funds immediately. More if you waited until WEX was launched. So clearly redress was possible, just not of the "legal proceedings" variety. The obvious move was to take that money and run, not keep all your money on the new exchange. But alas, crypto traders love to take unnecessary risks.
If Bitfinex or Tether had most of their fiat money seized, you think they would spin up a refund process like BTC-e did? I would expect much worse results through the court system, especially given the dodgy jurisdictions where they are organized.