I would just like to point out that not all sites do the following (and I'm unsure if OKC does), but watch out for tripwires as chacham15 said. Some sites that I've had the misfortune of "getting to know" use insignificant or blank inputs as a form of detecting unauthorized access.
One rule I follow is to: Retrieve, Analyse and Regurgitate Everything.
One rule I follow is to: Retrieve, Analyse and Regurgitate Everything.