If an assignment is set to use blind marking, and the course has the recent activity block on it, the student names are not anonymised. This means that a marker can not only see a list of who has submitted, but also see the timestamp of the submission which could easily be traced back to the anonymised submission.

To reproduce:

1. Create an assignment and set to blind marking
2. Log in as a student and make a submission
3. Add the recent activity block to the class
4. You see the name of the student who submitted and the time of their submission