I would think that the artist could still get the point across without such detail in that specific area. I am 32 and would not want my children-boys 12 and 10- to see it all layed out there like that. To me, it is something private and not to be put on display.
However, I don't think the quilt shouldn't be allowed at the show, perhaps somewhat secluded with a warning or something. I can imagine walking from one quilt to the next admiring the stitches here, the placement there, then BAM! its in your face. Would be quite a shocker to me...