I 50% agree with the OP. I think MtGox and other exchanges are fooling themselves to think that a few kids with PCs can compete with the big boys. There should be no day trading except through licensed brokers. In fact, the Bitcoin prices should only be reported by the brokers as well. Let them deal with the brunt of the public interface. Having a website that is open to the public is just a painted target for DDOS attackers. It would be better to have many brokers open to the public and a few exchanges only open to brokers.