I've had to crack admin passwords for family as well as at my job. For example the company I work for has a habit of coming in after either their tech guy is fired/quits or if their documentation is lacking. So often a client has no idea what the passwords are for their servers. At the same time I have family members who use Computer A frequently but left a bunch of stuff on Computer B which they completely forgot the password to.

Granted most other requests for passwords I see are often for illicit purposes.