Aleph Null is pretty much a classic example. Pretty sure Behold! A Elk! was nuts too. There was another that came to SS, buttsoupbarnes, I think. His mom died, left him a massive amount of money and he blew every last dime flying around the world for ridiculous surgeries and such. Because becoming a woman would fix his confidence or some shit. Rather than lose 50lbs and become more social of course. He seemed okay for a bit, but got run off when he started to promote forcing young children onto hormones/blockers.
I always thought troon was a self made word that meant trans goon but I may be wrong. Always figured it just spread from there because the reputation SA troons have of being hateful, unpleasant, loud, preachy, was so well known it spread across the whole internet like a loud shrieking cancer.
I know I definitely make a distinction between transgender people and troons. Troons being the typical permatriggered non-op, non-pass fetishists in this thread.
Probably the thing that I find worst is that while trans are generally of the "Hey, let's do all we can to help and support trans people", troons are almost always "Hey, let's do all we can to CREATE more troons!"