Parents apparently have no idea how to raise children. Parenting is tough, but no worries, there's always the unsolicited advice from family and strangers about what they think is best for children, and there are tons of parenting books available that may or may not help. There's also no shortage of contradictory studies out there that just leave parents utterly confused. Here are just a few recent findings on what's supposedly good or bad for kids. Remember correlation isn't causation, etc, etc.
If you'd like to read more awesome and interesting stuff, check out this unrelated (but not entirely random!) Techdirt post