The price are dropping in exchanges because there are investors who are dumping bitcoins right now. Exchanges have nothing to do with the current price movement, its us, traders and investors who make the price moves.

I hope you know that this market is based on speculation and if there are bad news that comes along, obviously investors are cashing it out resulting to the current price going south.

I suggest you do your homework and research what affects the price movement. I'm sure that you are very frustrated to see the price going down again. But you don't have to blame exchanges, blame the whale or shall I say Mt. Gox trustee from Japan who dumps $500 million worth of bitcoins.