But I Need to Get the Dust Out!

I was just walking back to my cubicle, and I heard a banging noise coming from one of the cubes I was walking past.  Being the curious type, I stopped and looked in to see one of the call center supervisors (who shall remain nameless... I'll caller her "J") holding her keyboard upright and banging the edge of it against the desk and then shaking it upside down.

Me:  What are you doing?
J:  I'm cleaning my keyboard.
Me:  You could damage your keyboard by doing that you know.
J:  No I can't.  I do this all the time and it still works.  Besides, how else am I supposed to do it?
Me:  They have little vacuum cleaners you can use, or a can of compressed air.
J:  I'm not paying money for a stupid can of air when I can just do this.
Me:  I'm telling you, that's like cleaning your car by crashing into a light post to shake the dirt off.
J:  Oh Nick, stop exaggerating.

These are the people we design computers and software for.  Always remember that.