Our bodies don't work in such on/off, black/white, states. They exist in a world of grey, where some amounts of something may not be bad at all, but when a tipping point is reached all hell breaks loose.

I like this description but you forgot that the body has its own defense mechanisms to cancel any external substance, so how we know if a substance is harmful unless we reach that breaking point? Anyway, it's known that trans fats raise LDL blood levels thus increase the risk of developing a coronary disease dramatically. I think that the study lack some significant data, but that's just my opinion.