Seriously, about the Grand Canyon in the public viewing areas.
I don’t see how you can stop anyone from sitting on a sill, without some block. But in the photo, the windows running the lrngth of the bed are problematic. I can see a kid trying to read in bed, leaning back and forgetting there’s no wall.
Adding: the fence in the first pic would still give me the willies…that sort did, in fact.