Thanks to technology, etiquette is a completely different game in today's world. For some users on the anonymous social network Yik Yak [1] — an app popular among college students — it's become necessary to establish some 21st century rules to live by.

This 21st century etiquette code covers a range of behavior, from when to like your friend's Instagram posts to how to properly use your phone around people. Take a look to see whether you agree with these rules and don't forget to follow the commandments of Instagram [2], too.

Thou shalt not look through friends' photos.

Thou shalt not post group photos where only you look good.

Thou shalt always like a best friend's photo.

Thou shalt always text secrets to friends.

Thou shalt not be rude.

Thou shalt not listen to Justin Bieber with both headphones when chatting IRL.

Thou shalt avoid using read receipts — or answer immediately.

Thou shalt not call someone unless it is truly an emergency.

Thou shalt text — and only text — when you've arrived at someone's home.

Thou shalt not ask for the WiFi password until enough time has passed.

Thou shalt take the proper amount of time to capture an amazing selfie.

Thou shalt never take a screenshot on Snapchat.

Thou shalt be aware of the risk of getting caught on social media.

Thou shalt always try to get an Instagram to 11 likes.

Thou shalt like your friend's posts as many times as needed.

Thou shalt recognize when it's time to Netflix and chill.

Finally, thou shalt learn the ultimate skill.