Well, yes, but people don't fall out of their beds at home either so I don't really see why they should start falling out of them just because it is further to fall. I think this is mostly a problem before you fall asleep, worrying that you might fall out ... Hence the scarf/long sleeve tops tied together etc. Or something as simple as putting something on that side of your pillow, if you can - that will keep you closer to the wall. I am a highly experienced worrier and know all about the fall-out-of-bed-worry, but have never yet fallen out of a bunk, top or otherwise.