Careful barely enters into it. This is friction-free walking. You need cat-like reflexes and luck to avoid getting hurt. The surface should not be bare wood. The wild areas in Oregon are treacherous enough, and people clueless enough that there should be a rough, well-drained textured finish on the bridge in question.
And signage. ODOT or parks can certainly afford a sign, and you’d think the insurance would have mandated one, but what do you expect for $70K a year?
You need to visit the frozen North for an extended visit. All surfaces are frozen, covered in snow and ice, after a blizzard.
Friction free walking is a way of life, not just an incnovenience. It can be done, and is, all day, every day.
Not to say there aren’t a few spills, broken hips and arms, etc., but it’s the weather, you shouldn’t be able to sue someone every time careless people fall down.
I guess I just believe more in personal responsibility, and less in using “the system”.