Yes of course Mumsnet is subject to this and other forms of trolling, it makes perfect sense to target the site in this way.
As I said yesterday, Mumsnet is aware that the site is subject to coordinated trolling...and they will act - when it is in their interests to act:
My post yesterday as I'm not going to type same out again:
Justine is clearly aware this is happening and that the site is being manipulated in this way - she references trolls and bad faith actors in her own recent posts when Mumsnet removed posts "stirring up conflict" regarding handling of abuse images by the site.
JustineMumsnet 4/2/25
"It's also pretty clear from what we can see behind the scenes that there is an ongoing, coordinated effort from trolls to further inflame these discussions, and cause as much disruption as possible. We are taking steps to remove bad faith actors, but we know this can be frustrating for those who just want to express your views about what happened."
www.mumsnet.com/talk/site_stuff/5267612-update-from-mnhq-addressing-the-recent-images-posted-on-the-site
However 'when it is in their interests to act' is the critical part...because Mumsnet is a business with profit as it's main consideration ..lots of the trolling activity is actually money generating as there more hits on the site, more genuine posters invested in the threads and subsequently more adverts being viewed. Which is where the money comes from.
So Mumsnet is not incentivised to act a lot of the time, as tackling this can work against financial interests. They will tackle when it takes the form of a direct hit on the site itself, as Justine has intimated above.
There is analysis that can be done to identify bots...IPN addresses associated with certain VPN accounts etc but it is doubtful Mumsnet will explore this more carefully due to the reasons I have given. If it ever works against Mumsnet financially, it will be at that stage there is incentive to act.
If you want to explore the impact of this activity on people and is worth having a read of the Asch conformity experiments; basically if enough people around you are saying black is white it can be enough for you to come to believe black is white yourself, or at least come to say it in front of others. Asch demonstrated this by putting actors in his experiments with unknowing research subjects...the research subjects doubted their own minds when surrounded with these actors, yielded what they knew to be true and conformed to the lies the actors gave.
So this is clearly a massive win to be gained by bad actors, and hugely worth investing in.
www.simplypsychology.org/asch-conformity.html
https://en.wikipedia.org/wiki/Asch_conformity_experiments