I've long entertained a dubious regard for the practice of lying to children about the existence of Santa Claus. Parents might claim that it serves to make children's lives more magical and exciting, but as a general rule, children are adequately equipped to create fantasies of their own without their parents' intervention. The two reasons I suspect rest at the bottom line are adherence to tradition, and finding it cute to see one's children believing ridiculous things.
Personally, I considered this to be a rather indecent way to treat one's own children, and have sometimes wondered whether a large proportion of conspiracy theorists owe their origins to the realization that practically all the adults in the country really are conspiring to deceive children for no tangible benefit. However, since I began frequenting this site, I've been exposed to the alternate viewpoint that this realization may be good for developing rationalists, because it provides children with the experience of discovering that they hold beliefs which are wrong and absurd, and that they must reject them.
So, how did the Santa deception affect you personally? How do you think your life might have been different without it? If your parents didn't do it to you, what are your impressions on the experience of not being lied to when most other children are?
Also, I promise to upvote anyone who links to an easy to register for community of conspiracy theorists where they would not be averse to being asked the same question.
I always questioned the existence of Grandfather Frost (the Russian equivalent of Santa). It didn't make sense to me that someone could break into so many tightly locked apartments all in a single day, and leave no traces of it.
To that end, I tried to stay awake on New Year nights and see for myself how he does it. This required my parents to jump through hoops, like carrying me to a different room "for my own good", to preserve the illusion. The turning point was when I peeked into my parents' closet and saw gifts that Grandfather Frost was supposed to give me. I still wish they just told me the truth from the get go, and I'm annoyed that they're bent on doing the same thing with my brother, who lacks my capacity for critical thinking.
Strangely, I stopped believing in God long before that, and before I knew it was called atheism.
Upvoted for catching on to the nonexistence of God before you figured out Santa Claus. I think that's the first time I've heard that one.