If you enable the anonmous access in MOSS 2007 Site. The anonmous user will able to access the form pages like: http://server/pages/forms/allitems.aspx
If you want to restrict anonymous users to access those default form pages.
Enable the ViewFormsPagesLockdown Feature to restrict anonymous users to access the site
Syntax: stsadm.exe -o activatefeature -url -filename
Example: […]