Comment by ineedtosleep

From what I've used of the Android app, there are enough warnings that notify you that the photo is being uploaded.

After taking a photo with your camera (or selecting one that you have stored locally), you get to a details page with a big button that says "UPLOAD" at the top right. So assuming that one does take naked photos of oneself or someone else, you'd have to confirm the upload. I only bring this up because FTA, the iOS screenshots just say "Done".

Now, if Instagram does indeed upload before you press the big green "UPLOAD" button, I'd say that's a breach in trust with the app.