I remember browsing around CompUSA a long time ago when Mac OSX first came out. I was pretty young back then too, in my teens. I was checking out bash and issuing Linux commands, and the sales rep walked up to me and said "don't play with the command prompt, you could screw something up". I remember saying that the demo unit was logged on in user mode, not administrator mode, so i wouldn't be able to do any damage even if i wanted to. Nope, that didn't convince him, so i left.
Yah, most people who work in retail are:
Retarded
EnthralledByShinyObjects
TrippingOnAcid
Abnoxious
Iliterate
Loud