Should employees be granted access on net at their workplace.. Fair or Unfair?

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Im a private employee and currently enjoying surfing the net because I was granted access. It help me enriched my knowledge from what is happening all over the world. Sometimes I am hesitant to believe that the world is BIG.. and it takes months to explore around the world.. or even takes several years to get to mars.. Apart or mars is at my desktop! (It is my wall paper) In one click I can go to paris, another click I am at new york.. hey I am quicker that jumper.. Everybody should enjoy.. you think it is good that employers should grant access on internet to their employees?