The driver of the car is. Footpaths are public domain, whether they cross a driveway or not. Your son had every right to be there. It is the responsibility of the car driver to watch out for other cars, pedestrians, and bikes.
If you're driving forward, you aren't backing out the car.
ideally 28 days
Check with your local government (city, township, county) to see if there are any regulations.
yes
parking lot driving school field driveway country road
No its not illegal to have it parked out of motion but if you were to be driving then yes it is
it's kinda about a love relationship but she uses a lot of metaphors about driving
Yes, that is dangerous driving, and/or driving without due care and attention.
Yes you can, just by parking your vehicle at the end of the driveway where the strangers are unable to pull their vehicle onto your driveway. Yes, if you build a gate on the inside of your property line and clear of the public property "easement". Of course, that answer is dependant on the local regulations.
"Useless", unless driving into the house was what you really wanted to do.
The driver travelling in reverse is almost always responsible. In this case, he would have had a duty to ensure the road was clear before backing out of the driveway.
I have the same issue; it goes off in my driveway and when I am driving. I pulled the fuse for my horn as the neighbors were getting a little upset.