Why should we follow the principle that, when applying the Golden Rule, we should act so as to preserve, protect and promote the Golden Rule itself?
Well, if you subscribed to the Rule would you want others to preserve, protect and promote the Rule? Yes? Then you should preserve, protect and promote the Rule yourself.
This follows Publish and be damned as number 16 in a series of posts on the Golden Rule. The first was Any fool can make a rule.