muk1 wrote:My concern was the text is a punchline unto its own - it plays off the fact kids refer to pumpkin innards as 'guts'. I saw it as separate from THE punchline of the shirt, though obviously related. I genuinely don't know if that makes it 'incidental' or not. Thus the question.
I've never heard anyone refer to pumpkin innards as guts but I don't doubt that you have. I guess it's up to bootsboots to tell us but I doubt that was the point of the shirt. To me, the point of the shirt is pumpkins carving people. The joke is, people carve pumpkins. Hence the title, we carve people.
Incidental:
1. Loosely associated; existing as a byproduct, tangent, or accident.
That character, though colorful, is incidental to the overall plot.
if it is not necessary for the understanding of this shirt, which it isn't, it is incidental text. 
I live, I learn, and so aid my end while I believe I'm winning