MediaWiki:Revdelete-suppress-text

Suppression mode should only be used for the following. Remember to set the "suppress" option if these apply.

Non-public identifying or highly personal information: e.g. name and home address, phone number, non-public email or IM, names on other websites, accidentally disclosed IPs, passwords, medical and criminal matters, sexuality, employers, etc.
Libelous/potentially libelous statements.
Copyright infringement.

General notes

When suppressing something, consider checking the contributions (including deleted) and other logged actions by the responsible account or IP, such as the the page creation log or the edit filter log. There may be additional material warranting action.