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Just in case anyone is interested, here is a link to a discussion about this activity. There is some very mild anti-Mormon sentiment expressed here, but there is also some very interesting discussion from a mostly Evangelical perspective. Another interesting thing about this discussion is that there is a report from one of the speakers from that evening, Craig Hazen, posted there.
https://www.freerepublic.com/focus/f-religion/1312955/posts