The cat does a lot of things while we're at work all day, but one thing he does NOT do is screw with the Christmas tree. This is Bingu's 3rd Christmas with us and he has not damaged our tree while we were away ever.
He waits 'til we get home.
Seriously. He has attempted to chew two branches and eaten at least three strands of tinsel in just the three days the tree's been up this year. But only if I'm watching.