(sheepish grin) I think I'm actually guilty of number 2.
Some of them might even ask you if they can bring their home PC to the office for you to fix it.
All IT pros — even the very best — screw things up once in a while. This is a profession where a lot is at stake and the systems that are being managed are complex and often difficult to integrate.
IT really is a thankless job in a lot of cases, much more so than others.
It's the part of an organization that everyone relies on and only realizes that when something goes wrong.