So, will anybody who is not on a blacklist and meets your whitelist criteria have the autonomy to anonymously downvote ANYONE they want or will there be arbiters within your organization controlling where flags can be distributed?

The @Bid.Bot bot does not do censorship in any way for both positive or negative bids. The only scenario where @Bid.Bot may act is by including the sender in the custom blacklist for what we is perceived as severe abuse.