All I know about snakes I learned from The Crocodile Hunter, but I agree it sounds pretty odd to me that a snake would kill two children and not even attempt to eat them. Animals don't kill for no reason.
As sad as it sounds, with the state of the world (people murdering each other and posting about it on facebook, women being held captive for over a decade, mass shootings, etc..), I find it to be a much more likely scenario that the parents strangled their kids and put the snake in there afterwards to blame it. Seems pretty simple, and they certainly wouldn't be the first people to murder their children. Theres way more precedence for that than the snake scenario.
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