This is significant. I have actually thought through the ramifications of such a recording, and since in many states it would not be legal as evidence, I've concluded that it's not useful if one's desired avenue of recourse for harassment is legal. On the other hand, if one is willing to go for some sort of "nuclear option" (with high self-risk if in a two-party consent state) one could just post it somewhere online. We have seen examples of such postings and their effects recently...