The negative reviews are almost entirely review bombing. I use this all the time, and have never had a problem with false flags. If anything I find things that should be flagged one way or the other going without a flag at all. 9 times out of 10 if you look at the profile that got flagged, you'll find why within a minute of scrolling. The transphobes (usually transmisogynists specifically, but all kinds of transphobes) who get flagged red love to complain about how bigoted and inaccurate this extension is and how it can't be trusted, but then you look and see them spouting the most hateful rhetoric about trans people, plenty of them even trans themself. It's not a tool for exclusively marking transmisogyny, but transmisogyny is transphobia, and when fellow trans people are anti-transfeminist, they rightfully get flagged red. TL;DR it works great and has kept me safe from transphobes, remember to flag accurately and block liberally 👍