Re: Location privacy
You can't prevent being tagged in an update or photo, but there is a setting that lets you review each of your tags before they appear on your profile.
To find this, go to your Privacy Settings page and click Timeline and Tagging on the left-side menu. Click Edit next to the second option, "Review posts friends tag you in before they appear on your timeline" to enable it.
On your mobile phone, the process is similar: Tap "More" on the bottom navigation, then tap the privacy button next to your name. Then tap More Settings > Timeline and Tagging > Review posts friends tag you in before they appear on your timeline.