Not only suicides. The school where I do my IFR refresher training also do what I call ‘joy rides’ for those who want to experience flight and perhaps start training. My instructor friend ( not young by any means ) was in the air showing this first timer the effects of controls. “Now move the stick forward and the nose will go down”, well the ‘student’ did by slamming the stick forward and entering a deep dive from which my friend had to physically wrestle the stick back, pull back high Gs and went close to impacting the ground,
On arrival after inspection the wing spar had bent.
I suggested he report this episode for a number of reasons, but he was reluctant to do it.
There have been other things I wish my friend reported, but they are all scared of the spotlight on them even tho it would be for the greater good.