I don't see the point in being able to make your own gamerules if you can't disable them. A custom gamerule should not output a signal from a command block if the gamerule is set to false or 0.

I am aware on the wiki this is proper behaviour, I just find it extremely useless. And if this feature was added then we could really make some cool multiplayer maps and ops could enable/disable certain aspects via a command.

The screenshot demonstrates that even though my custom gamerule is set to false a signal is still being output.

Edit: Thanks to the /stats command, I have found use for this feature!