Ah, you're right. The default value for `searchTransitive` is `true` (as of version 1.3.1, [AbstractBanDependencies:47](https://svn.apache.org/viewvc/maven/enforcer/tags/enforcer-1.3.1/enforcer-rules/src/main/java/org/apache/maven/plugins/enforcer/AbstractBanDependencies.java?view=markup#l47)).