I've gone and seen the corpse bride and wallace and gromit at the latest showings possible and still had parents bringing their kids (on a school night) or bringing their babies
I remember seeing Bad Santa and being shocked that some dumbass couple brought their kid to it...(if you haven't seen the movie, suffice it to say, it's VERY adult.)
To be fair, W&G is probably okay for kids above 5. Corpse Bride is for older kids.
But I can top your Bad Santa story. One weekend, we arranged with friends to split a 'sitter so we could go see Kill Bill 2.
Some a**hole parents brought their 11, 7, and 4 year old kids to Kill Bill 2. Seriously. The mom left in a huff part of the way through the film with the 4 year old, but the 2 older kids stayed with dad.
Z and I were just horrified at the complete dearth of parenting shown by those folks.
Beauty is truth; truth beauty - that is all ye need to know on earth...except TCP/IP.