I just went ahead and did part 6 since I already had it in my head. And a lot of you guessed right! It's about cyberbullying. A serious issue not only in real life, but in cyber space as well and in the age of the internet, people can easily hide behind an avatar and an alias to bully other's online.
Sorry about the confusion >< Here are the links to the other comics related to this:
THE OFFICIAL LOGO AND NAME OF CHROME BELONGS TO GOOGLE. THE OFFICIAL LOGO OF TUMBLR BELONGS TO TUMBLR. THE OFFICIAL LOGO AND NAME OF TWITTER BELONGS TO TWITTER. I DO NOT OWN ANY OF THE OFFICIAL LOGOS OR NAMES OF THE WEB BROWSERS AND WEBSITES PRESENTED IN THIS COMIC. THEY ALL BELONG TO THEIR RESPECTIVE OWNERS.