Eleven year olds don’t need smartphones and they don’t need to be taking photographs of other children in lunchbreaks and they don’t need in fact they shouldn’t be on social media as the vast, vast majority of them are not mature enough to deal with it.
My DS never got a smartphone until he went to secondary, before that he had a normal brick type phone to make calls if he needed to, and more to get him used to the idea of having a phone.
At secondary if phones are confiscated they have to be collected by a parent. If my DC got his phone confiscated I would hit the roof, and more to the point I would collect it at my convenience. That might be the end of the week depending on when it was convenient. He wouldn’t do it again though.
In both my DS’ primary and secondary schools there have been instances of children taking naked photographs of themselves and each other and sending them around to others. This hasn’t been about being pressured into doing so at primary, the incidents in primary were girls taking pictures of themselves and each other naked in the toilets and sending them to each other for a laugh because they could.
In secondary it was a bit more than that, but on both occasions it is worth noting that it is illegal to send a naked picture to someone else under the age of eighteen, even if that picture is of yourself.
Eleven year olds think it’s funny. Teenagers are becoming sexually active and doing so often has other implications.