I don't see the point of all the lying tbh. What purpose does it serve for a child to believe some magical stranger comes once a year and gives gifts to children? Especially since they get them whether naughty or nice. The whole mysticism of it all? Xmas is magical regardless, it's the spirit that makes it what it is.
It's more gratifying, imo, for kids if they know it's their parents showering them with gifts at a special time once a year. They also tend to straighten up faster when you tell em "oop, that's on the naughty list"