That cannot be assumed in every case. The whole "physician assisted suicide" movement -- a truly homicidal ideology --- assumes the opposite: that a significant number of people will suicide with full knowledge and consent.
And as researchers understand, many many suicides, particularly youth suicides, inspire copycats. It doesn't have to be psychosis. It could just be a youthful moodiness, sophomoric sentimentaliosm, or even a romantic idealization of the tragic individual who was "too good for this cruel world."
Obviously we are not all wired the same. I for one will never point a gun at myself, loaded or unloaded or do anything similar that is equally dangerous. Same applies to general firearms safety, which is to never point a gun at anyone unless you have the full intention of pulling the trigger.
One thing that totally pi$$es me off is when someone jokingly points an empty gun at someone. I get the strong urge to take the gun away and use it to beat some sense into them. There is no such thing as an empty gun.
Another is when a hunter sees someone in the distant, and uses the rifle scope to see who it is.