About me, I go with an explaining comment which usually goes like:
Hello, welcome to Superuser(SO/SF).
Please check the FAQ
(http://superuser.com) about the way
this site works. This site is not a
discussion board, this is a place for questions
to be asked and answered.
Then you add the appropriate explanation, depending on situation, like for example
If you want to ask a new question, do
it by clicking "Ask Question", to be in
a separate question.
If you want to answer to someone else,
do it as a comment under his question.
Commenting requires 50 reputation,
review the FAQ about the reputation
And bottom line:
If what you want to write doesn't
answer the question, don't post it as
Keep in mind that the way this site works is not obvious to new people, so I think an educational approach is the preferred way to handle things..