keep in mind, it's nobody's full-time job to maintain this thing. there are "the editors" who police content, and i'm pretty sure pg is the only one that works on the site itself, including the code. a list of banned sites is an easy way to cut down on maintenance.
for what it's worth, i'm pretty sure uncov.com is one of the banned sites. i keep showdead turned on, and i've seen articles submitted from there from otherwise legitimate users, and they immediately go dead.
Though I'm kinda curious if it's possible to "unban" sites on a submission-by-submission basis. Sometimes sites that are generally bad have an interesting article once in a while. Can we "unflag" sites that are auto-banned and let an editor know that maybe they're worth making undead?
for what it's worth, i'm pretty sure uncov.com is one of the banned sites. i keep showdead turned on, and i've seen articles submitted from there from otherwise legitimate users, and they immediately go dead.