A problem many users face when using inexpensively manufactured cameras - everything from Holgas to these old box cameras - is that the film develops "slack" inside the camera, and so does not wind onto the takeup spool properly. This slack creates a finished roll that is loosely wound, sometimes even bulging beyond the edges of the spool - a Fat Roll.
These gaps, especially those that extend past the spool, let in light that will fog your film at minimum, and cause long streaks at worst.
Maybe you're the type of photographer who likes the occasional accidental light leak. We would guess this is more prevalent among box camera shooters than most. But for many others, the quirks of the camera are enough to manage without having to deal with leaky film rolls.
Fixing a fat roll
Remember that it's best to unload the film and perform this trick in complete darkness to avoid light leaks. If you find that your camera regularly produces fat rolls, it's best to carry a small changing bag to unload the film. Throw in a rubber band to hold the roll until you can tighten it and leave it in the bag. Warn your lab as well if special handling is required.
If you have other tips or experience with this problem, please let us know in the comments below.