Well, I have a bunch of articles and forums posted for you to check out. See, opinions are like buttholes...we all have one. But facts are something you can't change just because you want to think or feel differently. I'm not a young person either, and have been into gaming and other circuits for quite some time. Newbie turned into newb when didn't want to type those 2 extra characters. People got tired of people who thought they knew everything but was wrong, such as you in this thread. We'd have people who would talk like they could hack a lot, were experts, etc but just talked out of their butts. When people tried to help them, they kept these inflated ego and weren't willing to learn or change. Thus where noob was used to differentiate.
What we can say is that languages are always alive and meanings change. And what we can also say is just because you've seen people use terms in the wrong way doesn't mean it was correct. We can have a bunch of people come in here and tell you that they were abducted by aliens, but would that make it true? Or if people all came in here and said you're a moron, does that mean it's right? So yeah, even saying "I've seen them being used interchangeably" doesn't mean anything opposite of what I said. It just means you're saying the problem has been ongoing on lots of people don't know the difference...which circles back around to my question of why people are misusing terms?