I think another approach would be worthwhile. The comic is based on communication; every line and letter is there because someone is going to read it.
Thus we can ask whenever the MitD appear: Why did the giant include MitD in this scene?
Is it because of plot? Because of rule if funny? Did giant want provide a clue? Etc.

There is an advantage to this method; in communication the important thing for the 'sender' is to be understood. He will therefore adapt the message to the listeners level of understanding. This include not only vocabary, sound environment, but also context and real world knowledge.

Another fundamental thing is that senders always use the minimum necessary effort to be understood.

More can said about this subject but it is constraining trying to do it on my HTC.
I will take a brake for now.