[rerx]

Depriving people (especially, but not only, adolescents) off their sleep is disastrous for their mental health. For instance ADHD may be linked to lack of sleep (Walker suggests this in his book, I don't know how strongly this is backed by studies). Since by now we know that sleep times are driven by physiological factors to a large degree, I find it inhumane to not take these factors into account in scheduling.

[GavinMcG]

Though it's not that simple; isolated use of sleep deprivation can be an effective treatment for at least one mental health issue: https://mosaicscience.com/story/staying-awake-surprisingly-e...

[rerx]

Walker sounds quite sceptical of this story in his book, sleep deprivation may be effective as treatment in some cases, but could be a cause of depression in more cases.