If you have turned off Automatic Updates in Settings>General>Software Updates, the iPhone will not update without user intervention. While the iPhone will download the updates when they are released, so long as the device is connected to wi-fi and power, it will not install them without user intervention.
You can share your thoughts with Apple about downloads by going to their feedback page, www.apple.com/feedback/iphone.html. This is a user to user support forum and Apple does not participate here. That is the only place they will see your comments/desires.