I like when I get the user information in an email. I can save it and refer to it at a later time if needed. I once too use to make extrem changes to accommodate the .5% of the user population in my communities but gave up. When you start trying to please everyone then the only thing you will be doing in your community is pleasing a small part.
Just reassure them that no one can gain access to that information and that the way your website operates is pretty much the way every website operates.
