"My Daughter In Law Tags Bad Pictures of us on Purpose."

Dear Cybersorter,
My husband and I are very private people, but we signed up to Facebook because we wanted to be able to see pictures of our grandchildren from abroad.
Our daughter-in-law frequently posts unflattering photographs of one or both of us at family events, and tags them so they show up on our wall.
Posting them without our permission is bad enough – but being forced to trawl through dozens of pics where we’re shown shiny-faced, close-eyed, or with a glass in hand is downright embarrassing, especially as some old school and college acquaintances have befriended us too.
We’re sure she does it on purpose, but we don’t want to cause a family row about it. Is there a way to prevent our photographs being posted without our permission? Or do you suggest an alternative course of action?
PS

Dear PS,
Other than locking her in your basement (illegal but tempting), you cannot prevent your daughter-in-law from posting or tagging those pictures.
However, you can de-tag yourselves. You can also prevent the photos showing up on your wall. Click on “Account”, then “Privacy Settings”. Click “Customise Settings”. Scroll down to “Photos and Videos I’m Tagged In” – under “Things Others Share”. Click on the lock sign. Click “Customise”. Click “Only You”.
This doesn’t stop other Facebook users seeing these pictures, especially if your daughter-in-law has her privacy settings open.
Ask her politely not to post photos of you on Facebook, or at least not to tag them.
If you really can’t talk to her, and insist on rising above it, post some nice ones of her and tag them “our beautiful daughter-in-law”. If that doesn’t guilt her into stopping, then it’s time to stoop to her level.
You must have a few less-than-perfect pictures of her knocking around? If not, take some, upload and tag them, nothing too nasty, just a bit of nose picking or bottom scratching. Perhaps that one where she’s sunburnt and tipsy? It sends a clear message.