I wouldn't call it "abuse" per se, but I do think it's harmful.I just had a thought right from left field. In addition to our children learning our faith just by observation of us, even if we don't actively teach it: What about teaching kids things we know aren't true- like Santa Claus? Then when they find out the truth: Most kids figure it out for themselves, but a few of them may become distraught. Could that considered a form of abuse?
I plan to approach Santa Claus as a game: something that can be fun, but clearly pretend.