It's definitely unethical. Shouldn't be illegal or anything like that...
It's along the lines of corporate sabotage, only the political equivalent. Should be frowned upon.

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"Man lives in the sunlit world of that which he believes to be reality. But unseen by most is an underworld, a place that is just as real... but not as brightly lit... A DARK SIDE!"
-opening from Tales From the Darkside