I guess kids are cute to most people. It's different to post pictures of celebs.
Still, I wouldn't post numerous pictures of 'em on each thread.
I wouldn't post any pictures of myself or my family but maybe not for reasons you'd consider reasonable. My hubby is a journalist and if they figured out that his wife's a FReeper, he might be out of a job, so that's why you'll probably never see me posts pictures of myself, my family or my friends on FR.