Duff, I think that the stories in the media are more than enough to scare most parents. When we were young, our parents rarely read about the bad things that happen. Kudos to you for recognizing and choosing when it's reasonable to be helicopter parents and when it may be better to let them spread their wings. As parents, I think part of us is terrified about anything happening to our children! Sadly, no matter how diligent we are, we can't prevent everything. I would bet that your dots are getting a healthy dose of balance.
I, too, have had similar experiences posting in Newcomers. If I reach even one person and can make a difference for them, then I am satisfied!