That's true. When I donated I left out the highlights (I just have a few and they are in the front). I'll do the same thing next time and just ponytail the back and leave out the top layer where the highlights are in the front.
I once made the mistake of telling them that once you called me "Miss Piggy" due to the fact that in highschool I had small feet, but not so much the rest of me and they still occastionally call me that. *grins*