In response to your last post; I'm aware, and it seems the person in question did not return to the thread to continue and in the more recent thread in question, no such response yet either, so as far as I'm concerned, so far so good in terms of the further derailment on either of those threads.
If you're that concerned by any repeat behaviour of the person in question then I'd recommend avoiding responding to it yourself, make a report here and we'll deal with it.