The adverse effects of Western Meditation could stem from being introduced to it in adulthood, when the brain is either almost fully or is fully developed. And having not been introduced to Mindfulness while still growing into an adult. I feel that if one was introduced to meditation earlier on in life, the negative outcomes would be far far less pronounced.
My curt one world reply was about how life
in general is always a risk for depersonalization/suicide. Look at this for example: https://www.griffith.edu.au/__data/assets/pdf_file/0034/359872/SuicideResearchVol6.pdf#page=48
So we shouldn't let minors play video games or use the internet now?
I'm sure you'd agree that video games and internet usage can potentially induce dissociation and suicidal ideation.
You can't bubble wrap the youth. You can give them tools to handle what may come up in life though. Look, I'm not saying to teach some version of full on Buddhism in depth in schools. Simple 5 minute breathing mindfulness before class isn't going to cause the end of the world.