After reading this thread, I expected an article about a teacher restraining students or doing something creepy. Instead, it's a bunch of middle school kids goofing around. It sounds to me like the whole thing was blown way out of proportion. A picture of a group of middle school kids who put a piece of duct tape over their mouths is not the first step to having sex with one of them.
There are laws in place about privacy. Some schools have additional policies in place. In a public place, there is no expectation of privacy. That means if a photographer likes the looks of your kids playing in the park, he can take pictures. There are actually websites out there devoted to this. (They cater to a certain type of person, but do nothing against the law.) There are legal limits to the use of the pictures. If they are displayed or sold as news or just as a picture, there is no problem. If they are used commercially, for example as an advertisement for a merry-go-round, the photographer would need a release from the parents of every identifiable child in the picture.
Inside the classroom is a gray area. It's not exactly public, but not exactly private either. Absent a district policy, there is no legal guidance, especially with older students. Usually those cases come down to intent when they come to court.
By the way, I was amused by this comment from the board president:
"Why was there duct tape in the classroom? How did they [the students] come to have access to it," said Haas. "We'll have these answers to these questions later."
And, in the real world, pedophiles usually target opportunity. They might visit the websites I mentioned earlier. However, if they act, the most common target is
family. That means limiting pictures to family does not adequately protect the child. Overall, they target availability: neighbor children, children they have power over, etc. Worse, a pedophile is usually not a creepy freak hiding in the bushes. Usually pedophiles come as a huge shock. They are people the parents like and trust. This is anecdotal evidence, but a friend of mine who spent a few years working with pedophiles who were incarcerated in Bismarck was shocked at how charming they were. They would have to be or they won't get the access they need.
Kidnap cases are actually down. It's actually safer to be a kid now in this era of internet and Facebook than it was when I was a kid in the late 1970s and 1980s. The perception is that the world has grown more dangerous, but reality is quite different.