When you send information to the Internet, it might be possible for others to see that information

Users keep recieving the rather annoying message

When you send information to the Internet, it might be possible for other
sto see that information

This message can be prevented via a Group policy setting or a registry poke.

Group Policy
To control the sending of non encypted traffic in IE use the policy setting under
Computer config\Windows components\Internet Explorer\Internet control Panel\Security Page\Internet zone Submit non-encypted form data

Registry Poke
HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\x

Key : 1601 Type :REG_DWORD Value : 0

Where x is the relevant Site Zone
3 = Being Internet

The 1601 value equates to the setting "Miscellaneous: Submit non-encrypted form data"