Not me.
I'd thaw it out, fire up the smoker and cook it with a meatloaf, fatties, or something. That way if it failed the taste/sniff test after it was done I still had supper.
And the dog would get a nice smokey treat.
But that's just me. Here in Wyocena we live in a hollow tree.
Double-take-edit
I just saw this: "It was purchased for Thanksgiving 2006." That's only a couple of months ago. Absolutely cook it. It'll be fine. I thought it was much older than that.