PA
Her crime? "Simply bringing and asking a legitimate question," as Miller herself says. It just so happens that question culminated in a historic Supreme Court ruling on Tuesday, which means the government must secure parliamentary approval before triggering Article 50.
In her victory statement of the steps of the Supreme Court in London, investment banker Miller said she was "shocked" at the personal abuse she has received in the past seven months. Last month, she told The Guardian: "I have felt frightened and find it difficult to leave the house."
Thankfully, this appears to be the views of a minority. For every poisonous post, there are others warmly congratulating Miller on her triumph.
But the haters are not operating in a vacuum. No, these keyboard warriors are being whipped up by Britain's press.
Take a walk through the websites of buccaneering pro-Brexit newspapers and it is easy to understand how petrol is being poured on the flames of fury.
Here's just three examples from Tuesday:
The Sun
The Sun
The front page of The Sun's website went straight for the jugular, branding Miller a "Brexit wrecker." The headline of the piece elevates her to "chief Brexit wrecker."
In the past, The Sun has referred to Miller as "foreign-born multi-millionaire," who belongs to a "motley handful" of anti-EU campaigners.
Daily Mail
Daily Mail
The Daily Mail
Here, Miller is painted as both part of the (presumably liberal) "elite" and as a gloating remain campaigner. The Mail has also labelled Miller a "Brexit wrecker" in previous coverage.
The Daily Star
The Daily Star