lets not forget that other MN rule, when a child, usually male, turns 18, they wake up on that day a fully formed adult with all the sense and experience of a 40 year old and anyone who doesn't is totally vilified
"my son (18) needs a lift home in the dead of night from the roughest part of town, there's no public transport, what should I do?"
"jesus christ my 7 year old regularly hitchhikes back from there"
Don't forget they hitchhike through shark infested rivers, and crocodile infested lakes, and 13 foot deep snow!
Your posts are making me PMSL @ssd 
I used to take my daughter to school and back. It was 3.5 miles and took 10 minutes to drive there. By bus, it would have taken her an hour and a quarter. (Walking would have taken about the same.)
So 20 minutes of her day vs 2 and a half hours. Not rocket science is it? What's more, the route for walking was a mix of lonely woodland paths and a very busy A road. And that's without the risk of bullies, muggers, abductors, and getting soaked in the rain.
Yet, I was vilified weekly, by people who were more than happy to let their kids go by foot or by bus. (Even people who were home all day and had a car.)
I was not.
I am not saying I am a better parent, just that I chose to take her myself. I did the same when she was at college. Took her there and back. So shoot me.