Apart from reporting the petition I'm not inclined to give Helen much airtime to be honest.
If you look at her twitter feed, though she may have a couple of thousand followers, her tweets are not being robustly endorsed and retweeted.
Most get less than 10 likes. The odd one seems to resonate on occasion to hundred or so, but the vast majority of popular tweets on her time line are re-tweets from other accounts.
I obviously don't know the reason for this; perhaps her twitter bubble is so restricted, she's actually reducing her own audience or if people simply don't feel overly strongly about what she's saying?
Either way, unless she's libelling someone I think it's best to leave her to her own devices. She has a right to free speech even if I don't agree with her on many things she tweets.
I simply don't believe she's actually that influential in the grand scheme of things and frankly I'd rather see the views stand, so that people who can influence the debate have something to reference when valid points are being raised about ROGD and potential side effects of puberty blockers (and Mermaids denying/minimising such) so they can then reach their own conclusions about the appropriateness of Mermaids inclusion in policy formation and the gravitas their advice should be afforded.