If you're not an avid Twitter user, you may wonder why sometimes tweets have a period in the beginning, right before a handle:
".@HCK@ is the best ever!"
This is not a grammar mistake.
Did you know there’s an estimated 20 million fake Twitter accounts?
Some of these may follow you and if they do, be sure you don’t follow them back. Of course, there are tools available that will differentiate between your real and fake followers, but if you want to know how to tell just by glancing at their profile, keep reading.