Well, I would think the acceptable etiquette for meeting a TS is easy. Its the same etiquette that would be acceptable for meeting any other person. If you are unsure as to what that is I would refer you to Amy Vanderbilt for the formal method, or Miss Manners for the more hip version.
Having said that.
How often do you say to yourself
Wow! That person is fabulously mediocre?
or...
Gee, what a tremendously average person he/she seems to be?
I got to get that into my life.
Most persons are attracted to people who have something (whatever it is) that makes them special, or not average, or allows them to be more than mediocre. And in being what you are its something that most of the world, at least 99% does not share with you. It's very unique. It's interesting. Might even be exotic. And there is nothing wrong with that. So why should it not draw people to you.
And in this case, it seems, since it is about meeting another TS it would seem to be shutting out one of the few, one of that less than 1% of the people who really does share something that only you two really understand.
Seems odd.
Also odd, the number of people who never want to be reminded of it, but seem to be thinking about writing a book about it.