A few days ago, a twitter user posted a photo of a pile of socks in the grounds of a school. The socks had allegedly failed to meet a school regulation requiring they be all-white.Most had black or grey soles. Some were also low-cut and thus considered inappropriate.The offending socks, according to the poster, were to be thrown away.In another tweet, a video clip shows a school teacher cutting the shoulder-length hair of a female student to level with her earlobes.These two incidents prompt questions about whether schools have the authority to dispose of students’ property or impose penalties…