1. This guy who tried to correct J.K. Rowling about a Harry Potter detail:
2. This woman who had no idea she was swimming with an Olympian:
3. This Twitter user who called someone a "bandwagon" fan of the Dallas Cowboys, not realizing they were talking to one of the team's players:
4. This guy who tried to call out Rage Against the Machine's Tom Morello for expressing a political opinion:
5. This person who tried to correct a CEO about the name of his own company:
6. This person in an online forum who asked a moderator, "who are you to moderate me?":
7. This woman who accidentally delivered a rather sick burn to Zach Galifianakis:
8. This guy who did not realize he was speaking to the professor:
9. Whoever did not realize that Jonathan Hickman writes actual Marvel comics:
10. This TSA agent who did not recognize Tony Hawk:
11. ...And this other TSA agent who did not recognize Tony Hawk:
12. ...And then there was this lady, who also did not recognize Tony Hawk:
13. This Twitter user who tried to argue that Donald Trump wrote his own book...to the person who actually wrote Donald Trump's book:
14. This woman who did not recognize Mara Wilson, the star of Matilda:
15. This person who tried to argue about Indiana Jones' costumes with the woman who actually made them:
16. This bartender who did not recognize Stephen Amell, who plays the Green Arrow:
17. And finally, there's this person, who lost their NASA internship after accidentally cussing out a member of the National Space Council.
H/t to r/dontyouknowwhoiam