We find we enjoy Harry Potter, the books and the first movie. There's nothing particularly exceptionally good or evil or "phenomonal" about it one way or the other. We're not going to fight crowds to see it right away, but before it leaves the theaters I'll go with my 13 yr to see it. We don't see the hoopla one way or the other. Just doing a Harry Potter shrug.
Santa is a game many people play with their children. You and I, dear child, know it is a game. We may give you a present marked "from Santa", that you can enjoy the game. But we won't lie to you, and tell you he exists, because later on, you would find out that we, your parents, LIED to you. How could you belive that Christ was true, if we told you He lived, and then lied to you about other things?
Santa is a game, dear child. Don't tell other kids and ruin their fun. It is their parents responsibility to decide when to tell them. We won't lie to you.