"I think the rules are put in place as a knee-jerk response to media hysteria. I think they are put in place without being thought through. I think that schools believe that "erring on the side of caution" with a blanket ban will make it all okay.
For the small minority of serious child protection/identification cases which do exist (and which examples have been given on here) far more stringent and complex protection needs putting in place than banning every parent in the country from videoing school plays."
I suspect that what happens is that the school have asked permission. When they get a 100% 'yes, no problem - take photos' then they don't worry about banning it (which is why some people are on here saying 'My school don't have a problem with it'. That should probably mean 'There are no parents in my child's school/class who have objected, for whatever reason'.).
However, if a parent says on their form 'No photos' then the school may discuss options and one option is just to say No photos. It might not be the most imaginative one, but if they've taken it then there is almost certainly a child somewhere in there who can't have pics taken. Otherwise they wouldn't bother. And it will be just one aspect of the 'stringent and complex proetction measures' taken. An aspect which other parents seem to feel free to come along and over-ride.
You could say they only need to ban posting them on FB or other social networking sites. All you have to do is look back at the earlier stages on the thread where one poster proudly announced that not only would she take photos but she would continue to post them on the internet to see why this might not be the best solution.
The point is, you won't know as a parent if there are kids like this in the school - they don't walk round with labels. But it's more common than I think people realise.
I have worked with kids (at a visitor attraction) for over 10 years. I work with both school visits and holiday clubs. I came across at least four cases (either siblings or individual children) where foster parents told me certain information to help safeguard the kids (who could collect them, no pics allowed etc). And that's just where I was told. Around 25% of parents ticked 'no photos' on the form - we liked to take pics to help us promote future events and also use to illustrate any articles etc we might write so always asked. I have no idea what most of the reasons were, but this is just for a holiday club where kids spent a couple of hours a day.
People have also asked about kids appearing in newspapers etc. I don't know how other places handled it, but if we were going to have a reporter up, we checked in advance with the school. Sometimes it would be a yes, other times they'd pull us to one side and point out a child or children for whom the answer was no. We got 'no' for at least one kid in the class maybe 1/3 of the time. Then we'd work really hard to have that child elsewhere (without them realising it) while the photographer was around. So when you see a pic of a class on a day out somewhere, you can't assume that 'how come they can have their pics in the media when I can't even take a picture at the school play' because chances are, those kids aren't in the pic. It will have been organised.
Rules are put in place because there are children in very real and dangerous situation. If you've never been made aware of it, you're very lucky. So are the kids you know. It's not media hysteria. It's what a scary number of kids have to live with.