>>56263>>56263First of all, if you're in a situation where you have to tell people how long you've been on a board, you've already screwed up. That kind of thing shouldn't come up outside of meta threads (or threads like this one, but obviously it's not on topic for every board).
If you've somehow let slip that you're a new fag, just lurk more so you know how to avoid that kind of thing and read the mood of the board or thread.
/a/ in particular is extremely elitist because anime is an extremely elitist hobby. If you don't like it, you're always free to go somewhere else with a less strict user base.