Are you one of the shrinking few who say that NSA's recording of everything you telecommunicate in some form doesn't bother you because you have nothing to hide? Even if that was by some miracle true and you are pristine and perhaps headed for sainthood you could still be in trouble and the evidence is on television everyday in the form of Reality TV.
Reality TV shows like The Bachelor/Bachelorette, MTV's Real World series, The Housewives of somewhere, or Big Brother all depend on interpersonal intrigue and conflict. Of course the usually dull normal types populating these shows are not capable of providing the intensity required so the magic of Editing saves the day. The hundreds of hours of digital dreck recorded each week are distilled into somewhat watchable episodes by manipulative editing placing bits of interviews with people recorded days if not weeks apart and making it seem like they were both about the same topic or person at the same time. Or the ever popular frankenbites using only parts of a sentence drastically altering the meaning.
Now use those techniques and others by NSA in a court of law or in the court of public opinon to slander, defame, or criminalize your activity. And since the source material is still classified there would be no way for you to effectively disprove the allegations. In the Will Smith/Gene Hackman film "Enemy of the State" the spygency still had to use some action in the physical world to set up the character assasination. We have moved beyond that but with so much of the world digitized not only audio manipulation is probable but video juxtaposition of you with terrorists and other criminals is a reality you could not fight effectively.