Why Is It?

I used to have certain people at work that would constantly ask me to diagnose what was wrong with their vehicle, or what did I think they should sell it for, etc.
I stopped responding to these questions and I don't give a **** that they are all pissed off at me now. Boo hoo.
I would be asking for part of their labor time or if hourly I would ask the boss for a raise and to be retitled as shop diagnostic tech.