Okay, let's look at this here...
No unsupervised play, indoors or out.
Okay, I grew up outside of town, so indoor and outdoor play were not an issue. That said, I wouldn't be suprised if they were a little paranoid about me playing outside in my early years. And their concerns would be sort of justified, since they lost their oldest son in a drowning accident before I was born.
For me now, as a parent myself, indoor play is supervised by default, since we live in a shoebox. Kids hete also do play outside unsupervised, but why I'm unsure; sure, it's a quiet street, and it has a bad reputation that sort of protects us, but that same reputation also puts us at risk.
Irrational fear of strangers and/or kidnapping.
I wouldn't quite call it irrational. Exaggerated, maybe, at most, but certainly not irrational. Reading that line immediately made me think of the disappearance of the Beaumont children, and many other cases since.
Strollers, play pens, and car seats until the kids are old enough to drive themselves.
Okay, this one does get my goat, and that's because our nice Government
made it a law for kids to be in booster seats until they're either seven years old, or 140cm tall! Madness, I tell ya!
Doing the kids’ homework, and then going to campus to argue with the teachers about grades.
Another thing that, as a tutor, gets my goat. But also the flipside gets me too, those who really push their child past the point of sanity to have their kid achieve "the best marks they are capable of" (i.e. straight A's in every subject they tell them to take). Please let your kids be kids!
Now, I'm sorry you had the police called on you for such a trivial thing. In all truthfulness, we are fucking terrified sometimes, when shit gets very real. But we are trying, and generally making good decisions, even if a few of us seem more incompetant than I sometimes make myself out to be. (Long story there...)