The midwit infiltrates through social skills and politicking .
Even in Viking culture, I'm sure.
They are the socially accepted cuckoo in the nest.
While never a real problem in societies -they can be hard working, productive - and great at cooperating, it's the imbalance - their amount of influence - that has really screwed things up.
(Marxism in the educational facilities, everyone and his dog going to uni, etc)
If you can't fight with words, the internet isn't for you - unless your intent is propagandizing and controlling.
If you're incapable of the intellectual fight, get out of the ring.