As I was alluding to: There is no historic evidence for any big exploit of some of these issues that suddenly seemed to pop up. And we wouldn't really need much more than one or two proven exploit cases to really show them, if they were in fact the case. Remember, these claims go to the very theoretical fundamentals and should be able to easily topple the whole shebang, shouldn't they?

On the other hand, NXT bugs have been exploited and the NXT network has been attacked in various ways, often exploiting some fringe boundary conditions or special cases. Everything has got and continues to get fixed as soon and effectively as possible.