Nothing to hide? Okay, let’s go there. Consider some spy finding this out, and deciding to use it against you.
1) You did something stupid in your youth. maybe a drug problem or something. you’ve long since been clean. However, a new potential employer need not know that since it could affect your chances.
2) You’re the ex of an abusive spouse, and you’ve moved for your own safety.
3) You testify in case as where despite you getting death threats, you didn’t get picked for the witness protection programs.
4) You work for a company and signed a non-discloser agreement, but figure it was okay to discuss details with a co-worker via corporate email.
5) You are on the phone discussing information that is considered attorney-client privilege.
6) Any general discussion of your personal protection in your home.
7) Discussion and/or online details of your access to financial institutions
8) Discussion and/or online content of your medical information.
9) Discussions on phone while you are the Power of Attorney for another person handling their affairs.
10) If suddenly you realized that your political and/or religious beliefs could in fact be considered suspect and a threat to government itself.
That was 10 reasons right off the top of my head why people my not want to be spied upon. I left the blatant violation of the 4th Amendment off - just for sport.
Toodles.
And a fine list it is, too.