Emojis are fine. But I remember the first times I started seeing "LOL" and "ROTFLMAO". And I realized that the person wasn't really laughing, but they were quietly typing that on the keyboard. If you think about it, before AIM and online chat (way before texting), people hardly ever faked their emotions so much. I mean, you could fake a small laugh, but you didn't outright say that you're rolling on the floor laughing, while you weren't even cracking a smile physically. That would be impossible over the phone, and AFAIK people didn't do it over email, either. It's a product of the instant-message culture.
And it also symbolizes the disconnect between the online persona on facebook, posting all those cool photos, and the real-world person sitting by the computer all those lonely nights. The emotions and the fulfillment of the emotions have become stilted, computers now provide a superstimulus (https://en.wikipedia.org/wiki/Supernormal_stimulus) that replaces deep, real-life conversations with a steady stream shallow online interactions. Notifications pull us back in for more like an addictive slot machine. And our kids are ill-equipped to fight it, which is why they spend a great deal of their lives addicted to effectively meaningless communication with people who are not next to them:
http://www.buzzfeed.com/benrosen/how-to-snapchat-like-the-te...