Rule 2: Mark sensitive content with a Content Warning.

Learn how to use the Content Warning feature.

Use the Content Warning feature for posts which are likely to put a burden on someone else.

Develop your own sense of when (or when not) to use the Content Warning feature.

If the topic or content of your post is likely to put a burden on someone else, use the Content Warning feature to give other people a chance to decide whether or not they want to see it.

Don't be a jerk.