I've heard of the seed oil thing becoming a major talking point over the past few years, and I agree as far as that anything in excess is almost certain to be a hazard to your health, and while excessive use of oils in cooking (sans olive oil) is naturally bad for you, I've not yet found convincing evidence that oils, seed or not, is bad in any minor amount. I'll have to dig into it.

Also, fermentation happens in the large intestine, not inside the cells themselves.