In ListManager, you have the ability to delete members who appear in a particular view when viewing members. This is done on a segment basis. Essentially you can create a segment of members and delete the members that appear in the results.
Example:
Members were recently added to the list on December 31st, 2011.
To delete these recently added members:
- Create a segment that pulls everyone who was added on December 31st, 2011
- Go to Members: View Members: Find Members: Segment
- Choose the segment you created and press Go.
- Click on the Delete All In This View
