At the risk of sounding all wussy....
My first reaction was tough tits, then for some reason I got the image in my head of a kid waiting for their Dad or brother to come home. Adults can at least rationalise loss and accept it, to some degree.
This was 100% avoidable, and it's an absolutely selfish loss of life, but there'll possibly be people suffering because of this that shouldn't be. I can't turn off my compassion like that.
I believe that everyone deserves a second chance and can be rehabilitated if they want to. Some people such as Dale Cregan are way beyond that and need removing from society for ever.
The other thing that bothers me is knowing the Police will in some way be blamed by certain groups for this, the same ones who think because something is insured it's a victimless crime "they can afford it, they'll get paid out" like some sort of twisted Robin Hood scenario. They seem to get angry that the police try to stop them committing crime, like its their right to do so and they've no choice but to.