A crank from Canada in the 1980s had a whole series of abstracts at American Physical Society meetings on his numerological proof that he is the second coming of Jesus Christ. Presenting something at a meeting means very little; it confers neither endorsement nor legitimacy. Were you unaware of that, or is this just another error posted with little attention paid to the truth?
Really? Does the American Physical Society have the abstract posted on their website?
I don't have the review requirements for the AGU meeting that these were presented at, but the ones that I can find say "Abstracts must focus on scientific results or their application. The Program Committee may decline to consider abstracts with other focus." I don't think that they would allow abstracts for a numerological proof of Jesus Christ's second coming.