I assume you're being smart, Demitri. But there's an interesting answer to your question-
Have you asked them if they'd like to be there again?
In the first two types of incidents, yes they might. The action can be addicting and those survivors might even become thrillseeking types afterward.
In the third instance- where the likelihood of survival was negligible and the fighting was desperate and dirty- not at all. Those survivors often become lifetime pacifists.
I wonder if that was a factor in O Sensei's famous revelation? I've never heard detailed accounts, but he was apparently faced with death on quite a number of occasions. Even though he was promoting peace when he was travelling in China, his experiences there did seem to influence his philosophies...