AA users are commonly frustrated by our naive building of dropdowns everywhere for a given association, because that option isn't scalable when you have millions of records.

The most obvious option is to allow the developer to blacklist certain models or tables:

ActiveAdmin.setup do |config|
  config.huge_db_tables = %w[tags categories user_actions]
end

The question then becomes: what do you replace it with?

As far as I can tell, there are three options:

• just remove it
• use AJAX
• use Rails' pluck method to just grab a name and an ID

So which would be best, as far as integrating into the official repo? (both for filters and forms)