When you get deep into any fandom you eventually run into a segment who like to impart their knowledge on you whether you asked for it or not. Know-it-all is the common term for these kinds of people. They are known as overbearing & uncompromising. This is most true within idol fan circles where they come in abundance.

I’m pretty sure that many readers of this site have noticed that my contributions have mostly centered around AKB48 lately. That is not by mistake, ever since I took the plunge into their unfamiliar world I have been knee deep in absorbing all of their material both past and present. This has prompted some reaction from those I converse with the most.