Respect the sites: Use the sites as they are intended to be used.

Be respectful: No harassment, brigading or bullying of other users.

Be mindful of privacy: No doxxing of users or sharing others’ personal information/content. 

Be truthful: No impersonating others or intentionally sharing untrue information. Do not mislead or deceive others.

Properly Tag: No using hashtags or keywords that do not apply to your content in effort to superficially inflate reach.

Follow the Law: No sharing illegal content or using the platform to aid in illegal actions.

Honor Copyright: No sharing copyrighted content which you do not have permission to share.

Limit Self Promotion: While it is ok to promote yourself, your business or brand, do so sparingly and in contexts where it fits. Do not subvert the site to advertise.

Be Mindful with Invitations: You are responsible for the people you let onto the network. Those who invite multiple abusive members can get in trouble for the actions of those invited members.

Label mature content: Make sure to mark any NSFW content as NSFW. This applies to posts, accounts or communities. Reasons for NSFW tag are:

Sexual Content
Nudity
Extreme Violence
Gore or Death