Sal Grover is an example of the indoctrination process the TERF movement has perfected.

Giggle, when it was first released, allowed trans women, but it also used an automated facial recognition system to decide who was a woman and who wasn't. There was quite a bit of pushback about that, especially with the fact that the system was far from perfect, and excluded many women, particularly trans women. They put in a process to manually approve signups from people who were rejected by the facial recognition system, but that was slow and more invasive of people's privacy.

Sal Grover at this point, doubled down on the facial recognition aspect, and the pushback against it also increased.

And then the TERFs came in. They told Grover that she was doing the right thing with her facial recognition system, and the fact it was screwing over trans women didn't matter. And the next thing you know, Grover just bans trans women from the app, and starts actively spouting TERF transphobic talking points, and over the next few years becomes an important figure in TERF circles in Australia...