Most modern clients prompt the user to allow remote images to load - it's usually not automatic. If there are some images you want to see (ie the message is in the image, etc) and it's from a site you trust, chances are you won't even think twice about allowing images for the message.
It's pretty obvious Sabu isn't responsible for this, considering the FBI is pretty much breathing down his neck these days. From his Wikipedia article: "Employer: U.S. government"