With me, most of the things I was diagnosed with didn't come from "experts", but rather people who were assumed to be. My school didn't have anyone of high enough value in the field to incorrectly lable me mentally handicapped - but they did and it was on my sheet for along time.
The problem is, ever since around the early 80's, specially the near late 80's and on, there has been a huge boom in in the tendency to "blame" an unusual or undesired trait on some kind of syndrome. I have a cousin, who I semi refferrenced in this thread's first post, who is labled with ADHD.
He doesn't have ADHD, but he's labled with it. He eats junk food, and runs around all day. He's so hyper at times his eyes automatically dilate. The kid's so unhealthy from this crap I swear he's gonna crash and have a heart attack from the strain of having to sit still for five minutes.
Then, like Wings said, you have people who want to be cool. I asked about pyromania, I don't think I have it, but I know people who claim too. They don't go and set a fire for a release of some sort, by themselves. No, they wait till they are infront of everyone and set a fire and spend more time discussing there "cool" problem, rather than being involved with the fire, a clear sign of simply wanting the attention.
No offense to anyone, but I figured I'd see alot of ADHD, pyros and at least one person claiming to be a nymphomaniac just based on how "cool" the words have become.
My sisters has a type of OCD also, btw, but I don't think she does. I don't know much about OCD, but she's really not compulsive, and only rarely does she get obsessive. She doesn't have to clean everything, infact she often forgets to clean food trays (!) and she's always losing things and saying how she should reorganize.
But she heared the word, and it sounded cool to her I think. And she, if talking to someone who can give her a more credible oppinion, she actually lies and talks about how she has to wash her hands everytime she touches something, which is a lie. She also mixes OCD with a few related things, as well. The funny thing, she didn't "have" OCD until she watched an episode of Oprah. This is what I was expecting.