After a few emails with DH support, I discovered that there was a file created by another user in two of my accounts. Somehow the permissions for two directories had been set to 777, and a compromised user put a trojan in them. I think that I jumped into conspiracy theory territory above, and misrepresented Dreamhost's security and response as a result of that. The combination of my emotions and my inexperience with dealing with hacking on web hosts led to an incorrect judgment.