What right does anybody have to say that any animal should be killed? Humans were not put on this earth as gods to decide what should live and what should die.
Personally, I don't like rottweillers and pitbulls etc, so using elementary common sense, I don't socialise or have any other contact with them.
Anybody who chooses to put a child with a rottweiller doesn't deserve to keep their child. I detest the hypocrisy and self-pity of somebody wailing about losing their "lil angel" in these circumstances. She didn't even want to look after the child over Christmas - instead she chose to leave the kid with her parents for the duration, presumably so she could go out socialising.
I feel similarly about the McCanns leaving their (several) children alone while they went out socialising.
And as for the people whose (6 year old?) child was killed whilst driving a petrol-powered bike on a public road ... all my sympathy is with the other people who were involved in the accident.