Some schools have informed police of the online allegations, which are published anonymously and name the school which the perpetrator attended.
At the same time, some boys are distressed to hear the allegations, and there are some fears for the mental health of innocent boys who are anxious they will be wrongly implicated.
The site was set up last June by Soma Sara, 22, who said: “We have to expose it before we can change it. We are trying to educate our generation and the older generations at the same time.” Many schools have drafted in experts to speak to pupils about consent, pornography and lad culture.
Alun Ebenezer, head of Fulham Boys’ School, said: “If our boys, and all boys and girls, have behaved in a way that is wrong it needs to be faced up to and dealt with. I do not think trial by social media is the right way to do this.”
Gill Cross, deputy high mistress of the all-girls’ Streatham and Clapham high school said: “It worries me that boys will feel targeted, or there will be a backlash which suggests that girls are moaning about things and exaggerating the issue. It is also a worry that boys will face another anxiety at a pivotal moment of their development and we don’t want them feeling guilty for the behaviour of others.
“That’s why it is so important that schools help boys to have healthy and respectful relationships with girls and with their ideas about how to treat girls or their sexual partners.”
Mr Ebenezer added: “No one is named on the website. There is one paragraph that says Fulham Boys School, and that’s the problem with it all because if you say that, everyone is implicated.
“It’s very hard to unpick but it does raise the issue that we have to address these things and take them very seriously.”
Eton College said pupils have been encouraged to report any concerns they have about what has appeared online “so that proper support can be put in place through our well established pastoral provision”.
Deana Puccio, co-founder of the Rap Project which runs training about rape and sexual assault at some of the schools named on the Everyone’s Invited website, including Eton, St Paul’s School and Latymer Upper School, said: “The majority of boys are absolutely lovely so it’s a really difficult time for them as well.
“They get made fun of and bullied if they show a sensitive side, or possibly worry about standing up for a female friend. It’s not easy out there — they are confused.”
Ms Puccio, a former sex crimes prosecutor in New York, added: “It’s really important we respect young men’s mental health and how they have been victimised by things like pornography. It’s not an easy time for any of them — it’s about recognising we need to help both young men and young women.”
She said young men are being “manipulated” by the pornography industry which is trying to get them addicted.
She added: “The average age they are exposed to porn is 11. What they are being exposed to is misogynistic, it’s promoting rape culture, it’s violent, there is no mutual consent, no mutual respect, no pleasure for the woman in any of this.
“If we don’t have these conversations with them what do we expect them to think? They emulate what they see. We expect them to know all this stuff but obviously they don’t.”
St Paul’s School said it “completely condemns” the actions described on the website. It added: “The majority of our pupils are kind and respectful.”