Yeah he has done stupid things - some things defy logic and common sense.
He emailed a former worker - this employee used to report to me and for good reasons this former employee gave his notice and moved to a better level, better paying position - I do not blame him at all. This employee resigned with me - he asked to meet with me and he personally told me and handed me his official resignation.
Any way I was cc'd on email he sent to this individual's new place of employment. In the email it was apparent my former report asked this person for my email so we could stay in touch - all quite appropriate as always good to maintain professional contacts.
However at the end of the email - this "idiot" asked him if they had any openings. What sort of person would do that while knowing they are including a higher up in the email? I, of course, let others know and my boss wanted to see the email. As this idiot had not asked me to keep anything in confidence I had no problem forwarding it.
But that is just one example -- I have a boatload.