So you think DJs are cool?

It's 4am and I can't sleep so I came downstairs in hopes of tiring out my brain with internet surfing (It seems to work in the middle of the day). I happened across this article on MSN titled "So you think DJs are cool?" It's the tiniest little article about "posing" DJs who I guess people are hiring and finding not to be as good as they expected.
Before even reading the article I knew it was going to be about the DJs that play music in clubs, raves, parties, etc. and a thought crossed my mind. For those of you who don't know, my dad is a DJ and has been for many years. When I was a kid, I would usually use this tidbit of information to answer the "something unique about you" question teachers liked to ask in questionnaires or as ice-breakers at the beginning of the school year (I'd either use that or say I have twin younger sisters. Apparently I couldn't think of anything actually unique about me). Almost as soon as I answered, someone would immediately ask "Oh, what radio station is he on?"
What I'm saying is, there seems to have been a shift at some point where people stopped most associating DJs with the radio hosts and started associating them with the people in charge of the music at parties like my dad. As I'm writing this, I'm starting to remember there was a time somewhere in the middle when DJs were known for riffing records (or perhaps that's still how they're perceived for many people). It's interesting how our perception of certain jobs seem to change over time even if the job itself hasn't changed at all. As I mentioned before, my dad is a DJ and he's been in charge of music at parties for over 20 years. In fact, he did my eighth grade dance kind of as a favor to my school (I'm assuming it was discounted because I know he did the music one night for Budweiser during the 1996 Olympics and there's no way a public middle school could afford that. Granted, it was a smaller party with less equipment needed... I digress).
I can' think of any other jobs that have had the general perception of their work change so much, can you?