Hell, Fences and signs won't even prevent folks who aren't thinking of suicide from making life risking dumb ass moves..
We have all seen folks - mostly tourists - ignore the warning signs at the coast, and venture onto the rocks reaching out into the Pacific ocean..... Several times a year around here - folks on the rocks are washed off by wave action and drown.
Several times - I've personally warned folks, some with small children that the signs are warning of a clear and present danger and strongly advise them NOT to venture past the signs onto the rocks.. A couple of times -- families with small children ignored the warning, wanting to "let the children get a better look"......
Stupid is as stupid does..
Semper Fi