When 18-year-old Jackie Rosas of California saw something disturbing on a blog she follows regularly, she didn't just feel worried for a minute, then click over to a new site. Rosas took action, and that helped save the life of a teenager she'd never even met.

It's a pretty amazing story. Rosas was able to help authorities track down the identity of the 16-year-old girl who made a suicidal threat on her Tumblr blog, even though they only knew her first name. 

Breaking up is hard to do. But with Facebook, Twitter, and an iPhone full of old (filtered) photos, it's even harder. According to a new study, people have a tough time erasing the digital mementos of former flames.

We've all been there. You and What's His Face have decided to end things once and for all -- for real this time -- so you scroll through your contacts, intending to delete his phone number. But when you get there, you just ... don't.

You know, sometimes I think technology -- my iPhone, specifically -- takes away from quality time I spend with my daughter. I'll sometimes text with friends, check my email, and take a zillion photos when the two of us are hanging out together. I know, not cool. But on the flip-side, in some aspects, technology makes me a better mom. Actually, it makes us all better moms. Here are 8 reasons why.

You can always count on our representatives in Washington, D.C., can't you? They've always got our backs! Of course, by now you must know this is leading nowhere good, because who would say that with a straight face? Congress reportedly voted down a bill that would have made it illegal for employers to demand your Facebook and other social media account passwords as a condition of employment. Hmm. Since we, the taxpayers, employ these representatives, does that mean we can also demand their passwords?

Scarlett Johansson doesn't understand social media. And because she's so pretty, she doesn't have to. When you've got cheekbones and lips like that, you're basically off the hook for anything. Did you know ScarJo doesn't pay taxes?

No, but seriously, let's talk about Scarlett Johansson and her feelings on Facebook and Twitter for a minute here. In a recent interview with Marie Claire (in which, yes, she talks about her divorce from Ryan Reynolds), the actress stated: "All of it drives me crazy. I don't understand this need to 'share.' We almost exploit ourselves in order to feel seen." And I get that. I feel you, Scarlett. I feel you.

Sometimes social media can be amazing, but other times -- a lot of the time, actually -- it's flat-out ridiculous and completely unnecessary. But it doesn't have to be that way! Here are five questions you should ask yourself before posting something online. (Be the change you want to see in the world!)

You know how sometimes when you're perusing Facebook, you see a status update along the lines of "Missing girl! Repost this on your wall now!" and you just ignore it and go on to like a photo of someone's shoes? Yeah, don't do that. An abandoned 4-year-old was just identified, thanks in big part to social media and people who heeded the ever-present "repost" message.

A few months ago, I lost my little sister, suddenly and terribly. I'm still in shock -- typing those words just now was a surreal experience. I see them there in black and white, and tears spring to my eyes and the familiar lump in my throat returns, but there's also a part of my brain that doesn’t believe it -- maybe I never really will. These three months have been unequivocally the worst of my life, but there have been many bright spots in the darkness, bright spots of love, support, and friendship, without which I couldn't have made it through. And one surprising source of light and brightness for me has been Facebook.

A writer for The Daily Mail recently wrote an article about how she thinks that someday her lovely daughters will regret their digital archive of "selfie" photographs. You know what I'm talking about, people: Selfies. Pictures we take of ourselves with our cellphones. Pictures where the camera is typically positioned above our heads in a downward-facing position, as to get the most flattering shot. Pictures 900 celebrities take of themselves and post to Twitter every day. Pictures ... some people post to Facebook.

Of course you want the photos on your Facebook page to be pictures where you look good (duh), but sometimes a selfie can be a bit tacky -- for instance if you're in a bathroom stall.

They say pictures are worth a thousand words, and I do believe that's true. But I also believe some pictures just shouldn't make their way to Facebook -- unless you luuuurve yourself so much. A healthy self-esteem is important, but there is a fine line, people. And these 5 pics cross that line!