While climbing in Australia this summer, I saw a small plaque at the base of a climb, about the size of a 3 x 5 card, it was bolted on with very small bolts. It had a dudes name, his birth and death dates and a short statement. Anyway, turns out he was a 20 year old local climber that had killed himself (not while climbing). It was unobtrusive, and you'd have to look for it to find it. Thats what you should go for. Freaked me out a bit though.