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http://www.planetrugby.com/story/0,25883,3551_65975,00.htmlReported incidents rise when interest in the topic grows, but long-term evidence doesn't yet support any correlation. Even so, my expectation is that tackle rule changes will follow. And there's a good chance that scrum caps/head guards will become the norm, even if not compulsory.
"... They ne'er cared for us
yet: suffer us to famish, and their store-houses
crammed with grain; make edicts for usury, to
support usurers; repeal daily any wholesome act
established against the rich, and provide more
piercing statutes daily, to chain up and restrain
the poor. If the wars eat us not up, they will; and
there's all the love they bear us."
-- Shakespeare: Coriolanus, Act 1, scene 1
