Sometimes users mark as "minor" edits that shouldn't be marked this way. This happens especially often with users who have "Mark all edits minor by default" turned on in their preferences.
This cannot be detected automatically, but a certain automatic sanity check is possible. For example, a large number of changed characters, or a change of more than X bytes in the page size. (X can be 100 bytes, but the statisticians in the crowd should decide about the default number, and this should be configurable, too.) In such a case the software should warn the user - "Are you sure you want to mark this edit as minor?".
This warning can be similar to "Prompt me when entering a blank edit summary".
Related: Bug 24313.
Version: unspecified
Severity: enhancement