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Teachers must do more to educate pupils about the risks of posting online, according to the parenting charity Family Lives.

It comes after a week when journalists, MPs, feminist campaigners and others received a series of abusive tweets including rape and bomb threats.

The historian Mary Beard was one of them - she told us if she met the sender she'd "smack his bottom".

Is that the spirit we should deal with trolls in? Or is this a more sinister problem - which needs more serious punishment?

Social media trolling: a serious threat or a storm in a teacup? Nicky Campbell takes your calls.