When you automatically cancel all recurring group meetings:
https://news.ycombinator.com/item?id=34230841
I've seen a couple of attempts to cut back on excess meetings in orgs that had way too many useless meetings and they somehow managed to make things even worse.
People who have a high propensity for creating useless meetings kept creating useless meetings and filled up any potentially freed up time within months, but a number of useful meetings that were driving real change were killed and never recovered.

