When a runner is suddenly struck with paralyzing hunger she can almost always find a snack somewhere on her person or in her purse or car.
Conveniently these snacks are almost always in handy, shelf stable 100-200 calorie portions: Gu, Shot Blocks, Luna bars, etc.
Also convenient? Generally speaking most people are never going to steal from a runner’s snack supply because normal people think that stuff is foul.
Win win, folks.