I have just looed at the posting you refer to and it has indeed gone.
I checked the database of postings and the original posting is there, as is the reply by the last poster, but I am guessing that the topic has been removed due to the wording in the last posting and general language used which is not in keeping with an open Forum run by a respected publisher.
The Publishers have the last word, and can, and do delete unsuitable postings.