We did a lot of things in the past that when looked upon with today's viewpoint seem negligent or even outright dangerous: riding in the back of pickup trucks, jumping off of rooftops (speaking from experience here), or, Heaven forbid, walking to the park alone. You know, the kind of things you always find on those lists that begin with, "You were a child of the (50's, 60's, 70's, 80's) if..."
I bought a box of slides at a sale a couple weekends ago and was struck by a few images. 50 years ago, there wouldn't have been a second thought about these. They say ignorance is bliss. Sometimes, it sure seems that way.
Baby in proximity to alcohol.
Turkey leg presents choking hazard. Bonus: Hot cups of coffee being carried over baby by person whose apron clearly illustrates her inability to balance them.
Smoking while pregnant
Hand baby to crazy aunt with nicotine-stained hands and no knowledge of how to hold a baby.
Eye gouging causes man to reflexively throw baby down
Leave baby with your drunk brother-in-law
Wide slatted baby beds, perfect for entangling limbs and heads.
Allow baby to slap family dog
Stand baby by dog who's clearly had it up to *here* with the slapping
That cap probably won't come off.