It's been about 3 years since the bill passed, and there hasn't been a single case of anyone being arrested or charged under it. The only effect is that it extends existing protections to gender identity. So, for example, you can't refuse to serve someone because they're trans, and you can't go around saying that trans people should be exterminated. Misgendering isn't an issue, I agree that would be quite absurd and overreaching, though I also think people who go around intentionally misgendering others are assholes.