I remember when I first joined and I thought that going gonzo would get me into some kind of cool-cats club. Where I would be recognized and I would be 'famous' in some sense. I assume many users go through the same type of phase when they join the site. They want to be recognized.
Similarly, people drop names and 'idolize', as you put it, posters they see often to gain a sense of belonging. The ability to namedrop someone who everyone recognizes gets you into the community. You become part of that whole. It's part of the same dynamic as the one I mentioned above. People post a lot and people namedrop to be part of the community and gain recognition as part of the community.
I don't think they deserve recognition for high post counts, but they will get it because people notice it. Let's just say that I have a lot of them on my 'ignore' list. Not because I feel they are annoying based on their posting habits, but because I feel they frequently contribute only in how inane their comments are.