Anyone who is so bored as to want to eavesdrop on my phone conversations can help themselves.
Seriously
People say that. But . . .
There are over 23,000 pages of laws at the federal level, and more at the state and local level -- a blizzard of regulations. Organizations (including the government) have tried to count the number of criminal laws and have failed -- they can't even count them (see
http://online.wsj.com/news/articles/SB10001424052702304319804576389601079728920)! Chances are (see for example
http://www.amazon.com/Three-Felonies-Day-Target-Innocent/dp/1594035229/ref=sr_1_1?ie=UTF8&qid=1410158597&sr=8-1&keywords=people+break+laws+every+day) that in the normal course of your life, you violate laws without ever knowing it. All that is needed is someone with information and the motivation to go after you.
Sure, if you never in your life get in anyone's way, the odds of that are small. But, donate or belong to the wrong group, be too vocal in support of the wrong cause, compete with some business or group or piss someone off with some inside pull, and it can be a different story.
There's a reason the Constitution has protections for privacy, due process, etc., and prohibitions against unreasonable search, etc.