I have come close to doing the same thing. Usually due to someone asking me questions after the last flight of the day.

One thing I like about the new Castle Creations ESC firmware is that it will "buzz" you every 10-20 s if the throttle is off and the battery connected (so ESC is on). However for everyone who likes this there is apparently someone who hates it (look at the CC forum over on RCGroups!). However these are primarily RC soaring who really like their flying silent once they fold the prop!

Also since I have the arming plug, when I hear the buzz--usually carrying the plane back to the pits, I simply pull the plug and that pulls the power to the entire system. Then I can remove the spent battery at leisure (hopefully before the next flight!).