How about giving players a "this realm is boring" button as well, silent protest only?
Heck, we could start with it having no IG effect at all beyond information—let the ruler and general know, and send the information to the dev team, as well, so we can get an overview of which realms are considered significantly boring.
If we see that some realms have a high percentage of players who think they're boring, then we can implement some kind of relatively slow-ramping negative effects.
