No, go back to my earlier post. Booing while a corps is coming on, on, or coming off the field is a no-no. My position is that during retreat, or its equivalent, a boo is for the score, not for the kids or the corps in general.
And I have done the show, the hours (and years) of blood, sweat, tears, and bones (rifle, ya know), and No, I would not get offended. I may disagree, but I would not be offended. Let the idiot boo, moo, or Blue.