Ok this is what I did. If you have the Yahoo mail app installed on your phone then you've already done the first step. If not, then download the app and continue with the rest of these instructions. After that, I go into settings and then to data manager. I turned off background data and immediately, the Yahoo app will give you a notification in your notification bar. Pull down your notifications and click on the Yahoo notification. It'll take you to a screen where you can manage your accounts. The account on the top should be "Motorola". Click on it and unsync anything associated with it. Mine only had "contacts" in it. Hope this makes sense.
Let me know if you need a better explanation.
Edit: I also turned off Google/Verizon Location Services and the photo location sharing feature.