Danbooru

Read the rules before proceeding!

help:blacklists

Blacklisting is a way for users to hide posts that contain tags they don't want to see, such as guro (extreme graphic violence), scat (feces), yaoi (sexual activity between males), and spoilers.

To edit your blacklist, navigate to My Account >> Settings. Type in the tags you don't want to see in the 'Blacklisted Tags' box. For example:

yaoi
nude male_focus

This will hide all posts that are tagged with yaoi, and all posts that are tagged with both nude and male focus. Posts that contain nude but not male focus will still appear, and vice versa.

Put each blacklist on a separate line. If tags are placed on the same line, only posts that contain all of those tags will be hidden.

In addition to blacklisting based on normal tags, you can also blacklist posts by pool ID number (e.g. pool:1234), rating (e.g. rating:e), uploader (e.g. user:bob), status (e.g. status:flagged), and score (e.g. score:<0).

You can also whitelist tags within a blacklist. For example, spoilers -touhou will blacklist all posts with the spoilers tag, except for those that also have the touhou tag.

When your blacklist is active, a category called "Blacklist" will appear on the top of sidebar on the left. You may click on a blacklist entry there to temporarily disable it and show the posts that match.

Limitations

Wildcards are not allowed within blacklists. For example, using *boys to match the 2boys, 3boys, etc., tags will not work.

Default Blacklists

The following blacklist is automatically set for anonymous users and new users accounts:

spoilers
guro
scat
furry -rating:s

Note that this only applies to user accounts created August 6th, 2015 or later. Accounts created before that had no default blacklist.