Why you ask? Its their responsibility to make sure the safe welfare of there children. If you can not see this, then you are young or very liberal which hey, i have no issues with, but I am not going to agree.
If my child was slagging anyone off on facebook, not only would they not have facebook, mobile, or anything I decided needed to show them that at 15, your not making the rules, you live in my house, and if you dont like it, when your 18, you can leave. Until then, I am legally responsible for you, so you do it my way. I honestly believe, that today, we have really dumb, lazy and disrespectful kids. Its because parents are handcuffed to what they can and can not do by law and the goodie goodies who have way too much say in how we as people live, not just how we raise our children.
The gun was symbolical of what people only wish they can do. Use a sledgehammer, chain saw, drop it water... Its all the same thing, however in American society, its seen as the right to bare arms and this is a whole different kettle of fish. In Australia due to gun laws and such, its overkill. I would tend to agree with its overkill, however I am in full support of his thoughts behind it, the video and most of all, the snooping.
Just like a drivers license, even facebook is not a given, FULL STOP.