The Bittrex situation is really beyond unfair. Least they could do is informed each user - yet, what happens is they get a generic message that their account is disabled because of reason A, B, C or maybe D, sucks to be you basically. WTF?
Hopefully decentralised exchanges will take off even more in the future. For altcoin-to-altcoin exchanges, there's really not much reason to go through a centralised exchange or is there. Only once you deal with FIAT is it really necessary to go through a regulated exchange.
RE: Bittrex and Bitfinex Rapidly Closing Down User Accounts