It was a planned duty, at least as of this morning when we found that the display did not work. We did not have "post-its", so we improvised by asking the person who was doing it to tear off little scraps from an old times posting sheet. If we have the people to do it in the future, then I hope other event chairs will continue it.
Believe it or not, the only "faux pas" that I know of that we did not overcome (other than some criticism about course layout and not being able to follow it) was that we did not have double sided tape to put the finishing position on the trophies.
Thanks for the feedback, by the way.