It's happened twice to me, so far.
It just made me feel incredibly sad and useless. Not angry though. I wish those people hadn't made that choice and I wish they hadn't done what they did to their families and I wish they'd waited to see how their lives panned out, but I also know that they were really, really unhappy with the world they lived in and couldn't see the people around them who loved them and wanted them to stay until things improved.
I hope more than anything it never happens again to someone I know but I don't think anger will ever be my reaction.