DCPP user password?!

Just wondering, if setting up a user password besides the admin's one, upon
encrypting the operating system for pre-boot authentication with Drive Crypt
Plus Pack 3.9, does affect secutity of the system. I mean, can the user
compromise the system by simply decrypting it with the help of DCPP recovery
CD and the user password that they normaly use for pre-boot authentication.
The rest is trivial using Bart-PE and the like tools...

--
Ricardo