Don't let your online life affect your real life.
Your digital reputation is defined by your behaviours in the online environment and by the content that you post about yourself and others.
Tagged photos, blog posts and social networking interactions will all shape how you are perceived by others online and offline, now and in the future.
A poor digital reputation can affect your friendships, relationships and even your job prospects - so protect your digital reputation.
(taken from http://www.cybersmart.gov.au/teens/how%20do%20I%20deal%20with/digital%20reputation.aspx)