The message you're seeing is because our User Echo configuration does not use SSL to secure your connection to the site. The message will be generated by your browser if you are prompted to enter details on a non-SSL secured page.
You're receiving the warning for your own benefit as it means that it is possible for a targeted attack to sit between you and user echo and attempt to gather data. You'll likely see this warning on any site that's not using SSL and requires a password. Basically it's just so you can be aware of this and use a password that would not be used elsewhere, just in case.
The chances of an attack in this manner are extremely low and because we don't deal with any financial details there's little that can be achieved by such an attack.