Making the link SSL does not make it secure. AAQ uses the "Contact Us" infrastructure, which sends a plain-text email to the storeowner. This is obviously not secure.

If you just want the data to flow to your server over a secure connection, you can certainly add the 'SSL' parameter to the zen_href_link call where you're doing ask a question. The downside of this is that you'll give your customers a false sense of security, that might lead to them exposing even more data than just their email address.