Well we totally need to design the system so people cannot take advantage of it. That's literally the core principle of the best systems: make it idiot proof. It's a horrible idea to just trust random people to do the right thing, eventually they won't and that's where things go wrong. It's very easy to just not go near the edge of a building, but we have guard rails for the idiots who just don't get it. Same goes for any design; if a human can fuck it up in some way they will fuck it up in some way, intentionally or not.