Better yet, have a "red pill" instead. Have an elitist site-within-a-site that only select members could see. Have it only available to members with a certain Karma, and then require that they get an invitation from another member already there.
Actually, it would be best to have all 3 levels!
EDIT: Another wrinkle. Have the "Red Pill" be divided up into groups, each requiring a separate invite. Membership to multiple groups would be allowed.
EDIT: Actually, something like this idea would be even better on IRC! Also, receiving the "Blue Pill" would look on the surface just like getting a "Red Pill" invite. Do Androids Dream of Electric Sheep?
It just seems... eerie, and a bit sad. I understand how effective a "transparent" ban can be for spammers, it just seems strange to see people comment for weeks in this mode. Never replied to, never voted up or down, seen by few. Like digital ghosts who may or may not even know they're ghosts.
"I see dead people. They only see what they want to see. They don't know they're dead."
If people are getting killed for no good reason, that sounds like moderator abuse. But I'm skeptical; I have showdead on myself and haven't seen anything that seemed like it was wrongly killed.