For about 3 years one of my schools had been using the same, single password on all their class accounts. Somewhere along the line, a new class was set up and because the account creation was done through a more recent process, the account had its password reset every 90 days, which is our standard.
For a while this was fine, but the teacher eventually learned that other classrooms had a single password that always stayed the same, and she started complaining that she wasn't getting equal treatment.
From this complaint, we then reset every student account in the school to have the same, newer security settings as everyone else. So suddenly, teachers and students had to change their passwords, which lead to them requiring to REMEMBER their passwords, and made it so they couldn't log onto other people's accounts.
The school was mad as mad can be at us, although things have finally settled down as the teachers found that they can set passwords to spelling words that the kids always get wrong, which forces them to remember how something's spelled (like principal or because or friend).
They're still not COMPLETELY happy with the change, but at the least, the origional teacher has since quieted down, least she admit to the rest of the staff that she was the one who dobbed everyone in. Morale of the story? Dunno. IT staff are jerks, or something.
->-<