Q:

Automatically flag posts containing a link to the same site as user's profile?

For reducing "self-promotion" spam, it could be helpful to automatically flag posts (especially a new user's first post) which give a link matching the site listed in the user's profile? Most often these are blogs, and the address contains the word "blog". 
Alternatively, the user could receive a warning (similar to what you get when you forget to put tags in a new post, etc.), preventing them from posting the answer, which would state the SO "policy", and present an "I understand this" link/button that the user could click if he/she still wanted to submit. Thoughts?
EDIT: Please have a look at the comments before voting on this answer. Remember, this is a discussion.

A:

People who include their SO profile in their SO profile would then be incorrectly flagged as spammers if they linked to elucidation in the form of a related SO question.
And for those doorknockers who are correctly aware to self-declare their affliation, they too would be cut under the gun of automatic flagging for the sake of automating things while plenty of humans already are failing their Turing tests.

