When these bitcoin exchanges freeze withdrawals for long periods of time how do we know they aren't doing this for profit? For example cryptsy right now has withdrawals pending for over two weeks so do to the scare the price of alts have shot up on the marketplace because people are trying to withdraw.
I don't think they are playing a good strategy. Once they start to halt withdraws people start to panic and try to get their coins. this causes even more difficulties for the exchange to satisfy the customers requests