This is one of those topics that spans forums, or could, but to me is much more about security/privacy than Android itself, so I've elected to at least start it here. If other moderators feel it should be in the Android OS forum feel free to move it.
While cruising along in androidforums.com this morning I came upon this thread:So Apparently Our Phones Are Taking Pics of us and distributing them without permission!
Several levels of indirection later I arrived at the page of the researchers who performed the research on the question/conspiracy theory regarding whether your phone is listening to you without your permission. They have developed a VPN Utility called ReCon that appears to have some very powerful features to help in maintaining privacy under Android.
I am not a VPN user, period, so the depth of my knowledge regarding same is shallow. What I like most about ReCon, though, is the controls it gives you and the analyses it can do. I'm seeking input from those with greater expertise regarding VPNs and the sorts of controls offered by ReCon in an effort to decide whether I want to install it on my Android devices or not.
Any and all input is appreciated.