The choice of controller name is not consistent with the behaviour we are modelling. We are in danger of introducing ambiguity about what is opt-in and opt-out.

The intent of controller action is to  'create an opt-out', however it is infact 'deleting an opt-in'. I would change the controller to ensure consistency:

```rb
class OptInController < ApplicationController
  def delete
    cookies.permanent.delete(:roptin)
    redirect_to(:back)
  end
end
```

If that is not compatible with the our Nginx configuration I would question if it needs to be simplified.