Yeah, the queen's fair game. She represents everything that those promoting these laws hate, so she gets no protection at all.
Here's a graphic breakdown of how it works, from the government's own website ...
So violence and damage to property is pretty easy to establish, but how to you properly legislate for hostility, harassment or intimidation? Especially when you're talking about stuff posted on social media, when the person reporting it doesn't even have to be the person or persons it was intended for. All they have to have done is read it. And it doesn't matter if the person posting it never meant to offend or be hostile to anyone. So long as the person who reads it is offended, that's enough. Which was exactly what happened to Chelsea Russell.