How can we prevent or stop people committing suicide?

Yeah, that'll work. Just what people need when they feel awful: some fanatic spewing crap about judgement and guilt instead of showing them love and understanding. *sigh*

Tell them where they are going if they do. Straight to hell

Every one can't read what is going in the mind of the man going to commit suicide. But I think, our attitude towards that man, sometimes may ignite the suicide thought in that man. So it's always better to be nice to everyone.

This is a tough one. I think suicide and depression awareness and education are important for everyone. Letting people know there is support and that this is just a few dark steps in the tunnel, but if they walk a little further, in time things will improve.

You can't. All you can do is help them find help.

We can't do anything in this matter..

Give them some weed and roll a joint with them.