[stephen_g]

You could liken it to that, but you're using a logical fallacy (it's both a straw man and a reductio ad ridiculum).

[jarin]

On second thought, I would dispute calling it a reductio ad ridiculum. We obviously share the opinion that serious belief in Santa Claus as an adult is ridiculous, but in reality belief in Santa Claus and belief in God share equal amounts of supporting evidence.

[jarin]

Haha yes, you're totally correct. It was intended more as an illustrative analogy than a formal point of debate, but I take your point.