|Venue for the meet up|
One couple was from interstate and another attendee was from the US who was in Australian on business.
The TA "community" is keen to maintain its credibility, and the long-term members keep a close eye on new "faces" that appear in the forum, to see that they don't depart from the etiquette of keeping contributions constructive and reasonably accurate. If subtle or not-so-subtle hints don't work, then the ultimate recourse is for TA "Big Brother" to cut off access! TA is a substantial US corporation, so it has an interest in maintaining its image.