Brian,
You need to re-educate your DBA. Even if you use a generic password, it is still quite well possible to track the individual user based on his network ID. This is both possible with proper db2 command line statements / freeware DBA tools.
I'm not at work now ,but I can suggest a cool monitor which will do just the proper job your DBA needs. (DB2 being VERY poorly in monitoring functionality as it is)
Ties Blom
Information analyst