FACEBOOK BELIEVES it’s doing you a favor by reminding you about posts you’ve made in the past. Called Memories, these resurfaced items are visible only to you, unless you decide to share them (“Hey, look at this cute thing my kid did 10 years ago!”). But for some older users, memories can be painful. Who wants to see that picture of an ex-spouse, for example? You have a couple of options to minimize distress.