How to survive in an open plan office. Step 1.

When overhearing misinformation, do not speak up! Firmly close teeth over tongue and gently but forcefully trap that lying piece of meat between the pearly whites (or yellows if you are coffee drinker). Gently apply more pressure as needed, depending on the size of the misinformation being perpetrated. If bleeding becomes evident, be cautious to not let the blood be seen. Do not speak until the misinformation is no longer being discussed. Apply this procedure as necessary throughout the day. To reach management level, you need to build up scar tissue to be successful.