Teach them responsibility. Teach them that it's dangerous to play with fire, and they'll be irrevocably burned if they keep playing with it.
What methods and techniques you decide to use are up to you, but the message MUST get across.
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Science is the organized unpredictability that strives not to set limits to mans' capabilities, but is the engine by which the limits of mans' understanding is defined-Yahoshua
  
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