Many good exchanges that i personally use are yobit poloniex cryptsy(not recently) and they do their job for what they are.
FUD..
Don't listen to this guy.
I wrote no trust in exchanges if you want don't leave your bitcoins there for a long time.
Because everything can happen you can see the last hack in mt.gox, bter hack etc.
The mtgox hack was one of the terrible story? will millions of lost for users.
you need to leave always a small amount of coins for trading, or you may lose the opportunity for a good profit
mtgox was a joke exchange, i'm sure that the more we go ahead the more secure exchange will be