Of course the Wii isn't safe! Didn't year hear about that woman who drank two gallons of water and refused to pee and thus drowned herself trying to win a Wii for her three kids from a radio station. Those kids now have no mother!
In all seriousness, the Wii is fine. Just don't be a retard and you won't end up like all the other idiots who pop up online with broken television screens.