alt Hacker NewsOh man where I'm from they'd probably just laugh and put them to bed. jkjk
To be honest I did some brief searching and couldn't find anything! The parent will be liable if someone at your home drinks and drives home drunk, but I couldn't find anything specific about children consuming alcohol alone. It is only illegal to sell alcohol to minor, underage alcohol consumption is explicitly legal if supplied and supervised by an adult.
Now I'm sure if the child were to be young enough other child abuse laws could come into play, but it looks to be exceedingly rare.
okay, so we now have: parent/homeowner responsible if someone drives home drunk, parent responsible if child gets drunk via abuse/neglect laws, and parent responsible for other crimes and damages caused by a child via dozens of individual laws.
is that enough examples to satisfy your initial request?
(which was a request for examples of the extremely broad statement: "We used to hold parents liable.")