The issue focused on the question of what was and wasn't an actionable threat, with some studies showing that just a few minutes' study in school can get you into trouble.

A key research study by researchers at University College London found that 'chasing out' could be more important than technology. The study found that after just one month, children who were chided for being late to school or over-riding their parents' authority were much less likely to do so again.

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