Basic Rules of Netiquette 

« If you wouldn't say it to someone's face, don't say it online.

« Respect people's privacy.

« Don't repost without checking the facts.

« Do not violate copyright property.

« What you post online stays online forever.

Author is Elizaveta Zaretskaya

https://www.verywellmind.com/ten-rules-of-netiquette-22285

https://heimdalsecurity.com/blog/netiquette-rules-safety/