If you're harassed to the point that you have to beat the person senseless then you should strongly consider reporting the incident to the police. Or a lawyer, in case for some reason the harasser doesn't tell the truth about why they got beaten senseless and the police end up involved anyway.
Most harassment doesn't go that far (at least until the harasser is convinced that you've got reasons for not being willing to beat them senseless no matter what they do, such as not wanting to get unfairly arrested) in which case the code of conduct says "an event organizer, volunteer, or a "Code4lib helper" in person (if at an event) or over IRC."
I would far rather keep it open to various options than having a single person on duty, because if you're being harassed and want to report it, then you should have a choice of who you feel most comfortable talking to. But this isn't to discourage people from volunteering to be *a* duty officer; the more options the better.
From: Code for Libraries [mailto:[log in to unmask]] On Behalf Of Ranti Junus
Sent: Friday, 25 January 2013 11:23 AM
To: [log in to unmask]
Subject: Re: [CODE4LIB] Group Decision Making (was Zoia)
Let's talk the practical and the implementation. Kinda tired reading the on and on and on discussions.
So, um, if I get harrased and I felt threatened, can I beat up that person senseless first for self-defense, then report the incident to... to whom?
There's on open question on the github  that I haven't seen been discussed yet. At least, I haven't heard the input from this year's
organizer: "Do we require a duty
Is it fair/reasonable/workable to have conference staff be in that role?"
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