Just don't back up to iCloud. Problem solved.
You know what's coming ...
"Switch to Android if you don't like it!"
"Apple decides how it works on THEIR phones ... 'NUFF SAID"
"Maybe you should leave!"
Man, it'd be great if Apple gave the option to store our data elsewhere, right? Build out a secure cloud provider API so you can plug whatever provider into the back of the phone and store your data in Timbuktu if you were so inclined.
Nah Apple doesn't care about privacy that much. Making that iCloud money is more important.