Parents - They should parent. In the modern times that means educating children about the internet and expected behavior online. Teach your kids about privacy settings. If needed, regulate access to digital devices. I'm sure (most) 13 year olds aren't buying their own cell phones, computers and internet access.
Kids are rough on each other, but they've always been rough on each other. The only difference now is that its a larger audience and more to interact with.
Kids need to know that they can simply 'opt out' if they want to and stuff gets too socially complex. They don't need to have a Facebook profile that's 100% public to every other kid in school. They could have a very locked and and private profile, or no profile at all.
School has no business checking people's private things though. Parents may have some rights but I'd also say children have an expectation for privacy.
Facebook has to provide its users (i.e. kids and their parents) with working tools that can prevent bullying. 'Report Abuse' links that work, for example. It should not be necessary for schools to have complete access to their students' accounts.
> When kids get foul with each other, what do the
> parents do?
Bear the responsibility for raising such a kid?Parents should "do" whatever they would normally do in communicating with or disciplining their children.