I'm not advocating for strict parenting. I'm advocating for sensible parenting. I believe that children need to know there are limits and boundaries, and on some level APPRECIATE knowing that grown-ups are in charge.
I'm all about giving kids freedom and choices...but only within those boundaries. Misbehaving in public places is definitely not allowed.
P.S. I would also love to enforce these rules on adults, e.g., people who talk loudly on cell phones for the entire train ride, oblivious to other passengers.