I had a look round an ex-Luftwaffe F104G recently, and bearing in mind the old 'razor blade leading edge' thing found the reality to be no worse than the leading edge on a metal propeller. In other words, although the wing is comically thin, even for a fast-jet, it isn't a problem to run your hand along the leading edge.
I could only see a problem for dwarves running into the unprotected wing at high speed.