If someone enters their name and it does not match they get this:
We could not find an exact match for the name entered. Please enter your name, email address, and response below.
How can we prevent them from responding? We don't want them to assume they are on the list and do things like add a guest.
Also there appears to be a JS error on the search results page when there is not a match, at least on Mac/Safari. For example at this URL:
We get an error:
http://theknot.vo.llnwd.net/crossdomain.xml bad request