mine is the motherfuckers that have the “you have to change your password” box when they log on for TEN DAYS before they have to do it. They lack the understanding that they will get locked out if they do not. That last day come around and viola! Once a month I have to reset passwords for about 30% of the damn company.
Also, the accounting dept decides to share all their passwords, then bitch when they have to change them. They want ALL their personal username passwords to be the same, and widely shared. I’ve gotten sick of describing why thats stupid, especially for accounting etc…and just tell them no.