https://ehwiki.org/wiki/My_TagsFiltering
Hard filtering is enabled by toggling the "Hidden" checkbox next to a tag. Galleries with these tags are filtered regardless of the presence of other tags.
Soft filtering is enabled by setting a negative weight to a tag. If the sum of weights of tags that appear in the gallery is less than a threshold that can be set under My Settings (defaults to 0), the gallery is filtered.
Weights
Weights can be assigned to each tag to set its "importance".
Can be between 99 to -99. Default is 10.
Negative numbers are considered "bad" and positive numbers are considered "good".
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