Every save is checked against these rules before it is stored. They target the shapes vandalism takes rather than judging content, and each one exempts autoconfirmed accounts. See the filter log for what they have caught.
| # | Filter | What it looks for | Action | Hits |
|---|---|---|---|---|
| 1 | Page blanking | Removing almost all of an existing page. | disallow | 0 |
| 2 | Large content removal | Removing a large share of a page in one edit. | warn | 0 |
| 3 | Crude language | Obscenity inserted by an editor without an established account. | disallow | 0 |
| 4 | Schoolyard vandalism | The classic "X was here" defacement. | revert | 0 |
| 5 | Repeated characters | Long runs of one character, or rows of exclamation marks. | warn | 0 |
| 6 | Shouting | A substantial addition written mostly in capitals. | warn | 0 |
| 7 | Reference removal | Stripping the citations out of a referenced article. | warn | 0 |
| 8 | External link spam | A new editor adding several outside links at once. | warn | 0 |
| 9 | Test edit | Short, contentless additions of the "testing" variety. | tag | 0 |
| 10 | Very short new article | A newly created article with almost nothing in it. | tag | 0 |
| 11 | Unexplained large addition | A big addition by a new editor with no edit summary. | tag | 0 |