From lewisje's reply
I see there's multiple ways to read the request, so:
Right now you can whitelist sites and filter everyone else.
I'd like a selectable blacklist mode, where I can blacklist sites and not filter anybody else.
To keep security filters up it'd be nice to be able to specify "all but whitelisted" or "all" overrides per filter list, regardless of white/blacklist mode.
If that doesn't correct any misinterpretations then the misinterpretation's clearly mine, wouldn't be the first time . . . anyway, I hope this helps.