How many people have unidentified mental problems that are flagged by being dragged down off a fence on a bridge? Fences on bridges aren't going to prevent ALL suicides, of course, but if they save one distraught person's life and direct them towards mental health treatment (while potentially preventing their body from killing you as you drive beneath the bridge) isn't that worth it? People commit suicide more often using prescription drugs but that doesn't usually kill anyone but themselves. We can't fix all the world's problems, but does that mean we shouldn't fix the ones we can?