The banlist is sciforums's list of banned users. Anyone who appears on this list is either temporarily banned or permabanned. People like Nickelodeon and Spuriousmonkey have found a home on this list.
The ban list can be compared with Schindler's list with difference that there is no Schindler to save anyone from annihilation.
One unfortunate issue with being banned is that PMs are no longer accessible. So instead you just get an email saying 'X' has sent you a PM. Grrr annoying.