Powerlevel suppression has its origins in this copypasta:
I'm a 4chan level otaku. I don't talk with you chumps in anime club, I don't read your "anime magazine" with new releases I saw two years ago. I don't need to go to a club full of fat smelly people to watch Full Metal Alchemist all over again. I've got fuckin' live feed torrents of the newest animes you haven't even hear of, and figures from said anime being shipped to my house so I can masturbate on them. Go read your "yowie" on fanfiction.net
, I'm downloading loli dojinshi and reading the fucking raws.
You keep wearing your naruto headbands and shit, socializing with your weeaboo friends. I'll be walking by, Anonymous. You'll never know that the master of anime had passed you by, because I suppress my power level.
It has nothing to do with hiding the fact that you enjoy watching anime, it has something to do with not socialising with lesser nerds.
A 4chan level otaku is beyond the state of regular weeabooness he has watched so many anime and was therefore confronted with Japanese culture to a level that he is able to perceive its flaws clearer than anyone else. Also, he is a bitter, hateful individual who hates other people, who prefers to be alone rather than being bothered by those he considers inferior (pretty much everyone else - but especially your regular anime club weeaboos).