I've always seen random suicides as a totally selfish act. In carrying it out, without question you surely hurt more folk than you were suffering yourself?
Fair enough if your lives at an end i.e terminal cancer or in cases where people have become paralysed from the neck down etc. Atleast in these cases your family are given time to accept whats going to happen and you've given them a face-to-face reason for it. Otherwise I've never really seen how things in life can get to a stage where you feel the need to end it all. It must take some courage.