I think you have the right to object to photos being taken because they can end up in the wrong hands. There is so many people that do not know the dangers of the internet. Peadophiles are preying on these school sites and get photos of children and then post them on other sick sites.
I live in the UK here we have the police comming to schools to give parents and teachers training on how to be safe on the internet and how to protect your child from the internet. And one of the main problems is photos of children being used. Anybody have access to any website.
Here in the UK every year when your child goes to the next class the school must and that is government law give papers out where people can either say yes it is ok or no I do not want my child's photo being taken. And on days when photos are being taken teachers have to make sure that those children whose parents have concern over pictures being taken should be kept out of photos.
It is every parents right. And there is nothing wrong with protecting your child.
I think people in South Africa are still very naive when in comes to the internet. I just see how many of them post pictures of their children on facebook. Without realising that their every detail is on that Facebook website. The other day here in the UK they have caught a peodophile ring who were using the Facebook as their platform.
Unfortunately the world has turned into one nasty place and if you do not act clever and in the interest of your child chances are you put your child in danger or yourself. So to think that with all you're details there on the internet nothing and nobody can get hold of it is pretty naive.
So yes you have every right to object it is your child and you just want your child to be safe and nothing is wrong with that.