You don't need to take umbridge because your story is not everyones
story. Unless you're claiming to speak for every serving person on the
planet since 1949?
Now think, what do you suppose is the reason someone getting chewed
out for scribbling on a shell really is when those are being used in
a dubious theatre? (hint: attribution) The absurdity is the real
crime.
Uhh . . . yeah, no. As someone who served, that's flat-out offensive.