OK, so perhaps many people do take the Santa thing to a level that I DO find weird. For the people who just tell the stories and have some presents from Santa show up under the tree, I don't find that too weird. The people who go through elaborate details and actively tell their kids he's real and answer probing questions as if he's real and actively try to get their kids to believe, I find that "weird." I also find it weird when people have their kids line up to sit on a strange man's lap. I also find it weird that I have to worry about my kid saying "Santa's not real." Of course he's not real, he's a fun story to tell around this time of year. There are lots of kid's stories that are fun and most of them we don't try to convince our kids that they are real, even if we play along with imaginative play.
I agree with this. We teach them all year around not to let strangers touch them, not to take sweets and presents from strangers, and other 'stranger danger' things, yet come December, it's OK to have a random bloke with a fake beard ask a kid's name, is they've been good, offer sweets etc. and yes, potentially sit on his knee (depending on where you are, it seems). At the same time, it's all about not lying to your kids and answering anything they ask as truthfully as possible (in an age-appropriate way), and to be honest about what they themselves think, but if they or anyone else questions if Santa is real or not, all truthfulness is out the window.
I agree it's weird that this is even a problem. My daughter comes home from school or playgroup full of nonsense - from someone's dragon being real to stories about god and how she will go to hell because she doesn't go to church, but it's really as simple as telling her that said dragon is pretend and that while some people believe in god, we don't (and why), and that religion is not actually about going to church. Kids will say a lot of things, and not everyone will agree with what they say.
Mine believes in Santa in the same way she believes in Peter Rabbit, I'd say. She's as old as Violet and has already questioned many a thing connected with it (why there are so many, we're not supposed to see Santa, how does he get into houses, how does he get everywhere etc.). It doesn't take away the excitement of Christmas. I'm not fussed if a kid tells her Santa isn't real. I'm pretty sure she actually knows, deep down, that he isn't, just like Peter Rabbit is only in the book and not every rabbit we see is Peter, and rabbits don't wear blue coats.