You can’t expect things from me! I’m busy!

I do website management, hosting and maintenance for clients – most of whom who have no idea what they’re doing. 

Me: What’s the server log-on?

Client: I have no idea. 

Me: That’s fine. Do you know who set it up, or who currently owns it?

Client: (getting visibly angry) You can’t expect me to know every little thing! I’m a busy man!