Baked Film

The temperatures on the moon reach 280 degrees Fahrenheit.  Wouldn't this have baked the photographic film until it frizzled?

This theory is based on the maximum temperature that the moon's surface reaches during the long lunar day. (The moon has a day that lasts for two of our weeks.) That's very, very hot. Fortunately, no-one went to the moon to spread film out under the sun for two weeks.

The Apollo missions were timed to take place during lunar mornings.  The temperatures are at their most hospitable then, so the astronauts themselves were at not going to overheat.

The film also spent all its time either within the camera or within the lander.  Unlike the moon's surface, both of these were designed to reflect as much of the sun's heat as possible.  So they never got anywhere near the temperatures that the surface reaches.

You also have to keep in mind that because there is no air, there is no ambient temperature and no convected heat on the moon. So if you are out of direct sunlight, and therefore radiated heat, you will be quite chilly.  As the camera and lander were designed to reflect heat, the film wouldn't even pick up much conducted heat from them. So that's no convection, little radiation, little conduction. There are no other methods of receiving heat.