This is what I was alluding to in my post above. It's late and I've been studying for far too long, so my brain is more or less mush at this point. But yes--I think the Taint is indeed responsible for corroding the natural safety nets in place by the Pattern from preventing seeping in information along one Thread from one lifetime to the next. Rand might also simply be a special case, but who knows.

I would make the claim that, however Rand got LTT's knowledge, it was absolutely necessary to his survival. Without his "instincts," which we know to be LTT-derived, he would have been made mincemeat by all of the Forsaken and shadowspawn at multiple times throughout the series.