Don't turn away willing volunteers

Leave registration desk open during events. I was a volunteer for several different time slots. On two occasions, I reported for duty, only to learn that the desk was closed during a plenary session. The only problem was that there were many people coming in who needed to get their badges, had questions about registration, etc., and none of the NN staffers were available to help. It created some ill will and a lot of confusion. I volunteered, and wanted to help, but couldn't do much except offer lame excuses about why we couldn't give a badge to a speaker.