Some contributors are not following the projects rules and policies and there is a risk they could disrupt elements of the project. You are unsure how to tackle the bad behaviour or how to best implement the relevant Published Policies.
A contributor is not adhering to the project’s Published Policies, but this is only happening when contributing to a certain topic.
It is necessary to prevent a contributor from making any contributions to the entire database
A contributor has contravened a policy and it is necessary to stop them from contributing for a short period of time.
A contributor is behaving in a way that raises questions about their understanding of your Published Policies.