@Grek K. thanks, I see your point about inconvenience. I am probably looking at it from a use-case where the user wants to disable the Dropbox integration and be presented with a user login screen when re-enabled again because it is likely to be disabled with the intent to switch users. There is a slight chance that the user may accidentally overlook the small sign-out link on the re-approval page, and still re-approve as the previously signed-in user. So, perhaps, it does make more sense in my app to set 'forceReauthentication'.
