Is your feature request related to a problem? Please describe.
Problem : spammers creating anonymous maps.
The spammers uses unicode letters to make it difficult to find in django admin,

Describe the solution you'd like
A CLI command to find maps from slug fragment and be able to delete them from CLI.

Describe alternatives you've considered
Being able to search maps with a slug fragment in django admin would be a good start, but as we have a lot of spam, the pagination is quite annoying. A CLI command is more bulk-action friendly.