- vandal creates a page with abusive language (with no edit summary, as is typical for vandals)
- page gets deleted
- abusive content gets preserved in page creation log (which uses first N characters of the content as autosummary) and requires extra effort from administrators to remove
This is not ideal. We should customize the page creation log formatter to hide the summary if the page got deleted (but that seems like a potential performance problem as a I don't think we have a way to do a mass page lookup for a mass log record lookup), or revdelete the creation log comment automatically when the page gets deleted, or just not put the page content in the summary in the first place.
See also: T12331: Introduce page creation log