By it's very nature, the word deception relates to the act of deceiving, carrying a negative connotation that conjures descriptive implications of sneaky, dishonest, and purposeful lies with malicious intent. Since deception is pro-active, usually accompanied by premeditated planning, and based on dishonesty and untruths, it is harmful, devious and malevolent.
As an example, I cite the deception that the government employed at the beginning of our economic crisis. The government minimized the bad smell that many began to catch a whiff of early in the rumors and rumblings. When the banks began to fail and small businesses could no longer attain loans, and foreclosures began to escalate without any help from the banks with refinancing mortgages, and bailouts began while bankers continued to collect bonuses, the taxpayers did not feel protected from the inevitable, but rather, felt duped by the very leaders they elected. Today, the statistics published are contrived to ease the fear that keeps employers from hiring and to instill hope in the remaining unemployed. The truth of the matter is the fact that in an election year, deception is seen as a matter of course and the ends justifies the means. My reality regarding the pseudo improved jobless rate is a preconceived plan by the government to banish extended unemployment. I believe all the "caring" speak from the president was just another political ploy, with his full intent being to pacify the people with a short unemployment extension, rather than the year he promoted as humane in helping the disappearing middle-class.
Once discovered, deception always destroys trust.