Think that the boot camp won’t change the behavior learned over a life time without strict reinforcement from the parents. Just a gimmick

In some cases for parents to take more control they would need to physically lock the devices away. I know a child who had one taken away from her, she found it and started using it again – in her room – her Mum thought she was reading a book as the last time she saw her she had a book in her hand. She has been a “bookworm” since before she started school. Some kids are very defiant and sneaky. e.g. go to bed, wait until everything is quiet then sneak and do hat he/she wants to do. I have gone through that when “childminding” a friend’s child overnight. I woke up and discovered there was lights on in a living area that had been switched off before all of us went to bed in our rooms.

Think certainly it might work. The only thing is that’s just a camp. How can you change you change an addiction in just a week or few weeks, when often the addiction became persistent over years ? It would need follow up and support to bring that what was thought, bring in practice in every day life.