The beauty of the internet? Anonymity.
You can be anyone online, you can say anything online, and in many cases, you can easily mask this all behind the secure facade of anonymity.
That massive secret you're not ready for your coworkers and old friends to know? You can always share it online with understanding strangers you won't have to look in the eye.
However, even secrecy has its limits, and there are times when IRL friends stumble upon the secret accounts of loved ones only to learn shocking things.
I posted a funny picture of my school on a different account. A classmate recognized the location of the picture and PM-ed me.
I looked through their past posts and figured out who it was. I also learned that she hadn't ovulated in 8 months and had some serious v*ginal issues that were being explained in detail on several female help subreddits.