According to
this article, a 12 year old Canadian girl took her father to COURT to protest the fact that he grounded her for accessing websites he tried to block and posting pics of herself only.
SHE WON!!!!
[insert eyeroll here]
Even better, she used a court-appointed lawyer to argue her case, so not only was it ridiculous, but the public paid for it.
I certainly hope this doesn't catch on. It's bad enough that certain forms of punishment are often prosecuted as abuse, if parents can't ground their kids, there won't be any way to control them at all.