> Have you changed your mind about that?

No. Unlike a rootkit, context really matters in the case of a backdoor - not so much the implementation means. BO is no more a backdoor than vnc or sshd. Now if Dell decides to secretly package BO in their product line, then it is a backdoor.

> ...backdoors should only be describing intentionally weakened security.

I can't think of a backdoor that does not meet that description, do you have anything in mind?