This is true. The realisation that we are not immune is scary though. Sydney is a beautiful place and I can imagine many avoiding the area now. Just as @GROOVER pointed out about a friend of his not going anymore. And it cannot be blamed. We normally take the kiddies to darling harbour's playground here and there, and now I admit I'm scared.Incredibly sad, but Im not sure its a bad thing for us to be aware something like this can happen, in some ways it was inevitable, I heard someone in the media last night say before this when there was warnings he thought it was "cute" that we would think we could be a target, and never took it seriously, so to be a bit more alert is not a bad thing, its just sad that this had to happen for some to realise we aren't immune from these things.