Interesting,
Nimrothiel.
Going back to Kransha's theory and
Cirith Knukol...how then could a hobbit-destroying - or devouring - finger turn into Bombadil? Is it because, during the course of the hobbits' digestion, the Finger grew in size and assimilated the life-force - for lack of better words - of the hobbits, thus gaining their jolly disposition and rotund belly? I would find such an act unforgivable, despite the acts of kindness done later to Frodo's company.
Or perhaps the hobbits also experienced Stockholm syndrome...nah!