I love all your hypotheticals, it shows your imagination works well.  Come back to reality for this conversation though. Reality is a fence does nothing to address the problem. If everyone put as much energy into fighting to fix the mental healthcare problems as they do screaming about fences, I bet the mental issues would start to get fixed. And fixing mental healthcare issues will do more than just stop suicides on the bridge,  it will help stop ALL forms of suicides and probably help the guys running around pushing people from bridges. Lol.  Heck it may even fix some of those issues of someone throwing pumpkins.