I think paranoia over information already part of public record is something to laugh about, yes. Let me know when they start collecting SSNs and bank account numbers.
Actually... this could be a serious problem, legally speaking, especially if enough people started to make a stink about it. I'm assuming that given Fanime takes place in California, the organization is also registered as a non-profit in California, and that California law applies. Particularly:
Information-Sharing Disclosure, "Shine the Light" - California Civil Code sections 1798.83-1798.84. This law lets consumers learn how their personal information is shared by companies for marketing purposes and encourages businesses to let their customers opt-out of such information sharing. In response to a customer request, a business must provide either: 1) a list of the categories of personal information disclosed to other companies for their marketing purposes during the preceding calendar year, with the names and addresses of those companies, OR 2) a privacy statement giving the customer a cost-free opportunity to opt-out of such information sharing. Financial services companies subject to the California Financial Information Privacy Act are exempted from this law. See the Recommended Practices, pdf in relation to this law.
Standard disclaimer: I am not a legal professional, just somebody vaguely familiar with hunting up bits on laws via Google.