I'm going to toss my two pesos here...
I noticed that /jp/ seems a lot more... civilized when there is less moderation... less clutter, less rage... but when meido kicks in... everything goes overclock hyper mode... and I think I know the answer...
Contributors (aka shitposters as some of you call it) craves attention and nothing beats the adrenaline rush of having the meido in your tail stalking you... in turn you ramp up the game and find creative and funny ways to use the current circumstances to achieve orgasm... without meido and the attention, it's just posting on some imageboard... at that point, you close the opera tab and browse sankaku instead...
I dunno...