They would have to have one heck of a spy service to even know for certain just who is at the keyboard. On the other hand, Santa, "...sees you when you're sleeping and he knows when you're awake. He knows if you've been bad or good so be good for goodness sake!" I have always thought of Santa as the worlds biggest stalker. Perhaps they could team up.
Bottom line if you have to ask then don't. Don't do it, don't ask if you can and definitely Don't admit you did. Nike had it right.
What's yours is yours. What's his is yours. Until death do your part. Unless it's in the divorce decree...