In the Flipside world it does.
The way Melter words it on this
page and the way it is explained on this
page made me think that bloodlust only caused the wanting to kill part, but not the cannibalism. I'm guessing now that the words in quotations on the Melter page may not have necessarily been his words, but may have been words Mary was recalling from another time.
Hmm...Danzig stated that 'this world is a lie', and now the Thin Man explains that his experiments are related to the world not being as it seems.
This is just speculation, of course, but could it be that the Thin Man is aware of the fourth wall?
Maybe he plans on breaking it. Literally.
I used to think the big reveal was going be that Flipside was just a D&D game,but then I noticed the other comic Brion F does and figured that would be too obvious. If it does go the breaking the fourth wall route it'll be interesting to see how he'd differentiate from other takes on the concept.