Strange authentication, when account is disabled

Hello.

windows environment.

When I disable a user account, a see next:

1. w2k, fp4; db2 v7.2, FP10a: I can connect to database with this userid and
ANY password!!!
2. w2003; db2 v8.1.4: I can connect to database with this userid and its
password!

Is this a feature (if so, this is a very strange feature I think) or a bug?

Best regards,
Barinstein Mark.