I've found that the best way to manage Hobbes is to use an Email program that allows users to set up rules or filters to handle incoming Email, e.g., Outlook, etc.
Using that program, set up a separate folder for 'Hobbes' (or something like that) and then set up a rule/filter that (1) identifies all incoming Email with the words [T@H] in the subject line and then, (2) moves it to the 'Hobbes' folder. This will separate all of the T@H message traffic from your other Email and queue it for your reviewing pleasure in its own folder where you can sort it by subject, author, time received, etc.
As an added benefit, using folders to manage individual Emails from Hobbes will allow you to receive the Hobbes postings as close to "real time" as the Hobbes server and your ISP will allow, which is sometimes nice. Once the messages are separated from the rest of your Email in their own folder you can easily delete the messages with subjects or authors that you aren't interested in reading. It also makes it easier to respond to individual Hobbes postings since you'll no longer need to cut and paste from the Digest compilation into a new Email.
Once you've mastered this first rule/filter you can then get fancy and create "Kill Files" which are rules that identify Email by key characteristics (subject matter, author, key words) that you don't want to bother with and have them moved direct to your 'Trash' or 'Deleted Item' folders.