The BBC article has more details why judge rule to isolate this young man https://www.bbc.com/news/technology-67663128
The hackers sent out threatening text messages to 26,000 EE customers
... Another Lapsus$ member, who is 17 and cannot be named because of his age, was found guilty in the same trial, which lasted six weeks at Southwark Crown Court.
He worked with Kurtaj and other members of Lapsus$ to hack tech giant Nvidia and phone company BT/EE and steal data before demanding a four million dollar ransom, which was not paid.
They also stole directly from individuals through their cryptocurrency wallets.
.... As well as hacking offences the boy was sentenced for what the judge described as "unpleasant and frightening pattern of stalking and harassment" of two young women.
... The gang - thought to mostly be teenagers - used con-man like tricks as well as computer hacking to gain access to multinational corporations such as Microsoft, the technology giant and digital banking group Revolut.
... It is not clear how much money Lapsus$ has made from its cyber-crimes. No companies publicly admitted paying the hackers and the hackers did not provide the passwords to seized cryptocurrency wallets.
Do you have any proof of bombed hospitals? On all of the photos/videos they are perfectly intact. That's why hamas members like to sit in them ¯\_(ツ)_/¯
No problem, I'm glad to have such a great discussion! By the way, English teachers in slavic countries like to teach very old phrases/memes. Like "raining cats and dogs" for the heavy rain, "wet blanket" for a grinch person. Also they can trying to tell something about cockney (which will never help students in real life) So it's no wonder that some virtually non-existent russian memes could go into textbooks. But the "go to Riga" is not completely dead yet. Need to wait for a decade or two :)
By the way, the Riga sounds like "Ryga" in Belarusian. So this idiom should not have been outdated. Just a bit artificial. But to be artificial is okay if you want to avoid direct naming of unpleasant things. I believe that "travel to Riga"="poyekhal rygat'"="go puke" is a meme for a lot of native Russians around Saint Petersburg.
It's totally ok that some teacher include that meme into their course.
This is totally recognizable for a native speaker (like for me in my late thirties).
You will be really surprised how many local silly names exist for menstruation. "Red day of the calendar" - allusion on communist holidays. "Red army arrival day" - no explanation is needed. "Relatives from Krasnodar just come" - Krasnodar is literally "Red Gift", so it's obvious again. "The critical days", "these days of the calendar"... I've heard all these variants in the wild by my own ears.
P.S accidentally found an independent confirmation regarding Riga https://translate.google.com/?sl=auto&tl=en&text=https%3A%2F%2Fcyberleninka.ru%2Farticle%2Fn%2Fbolezni-i-ih-frazeologicheskie-evfemisticheskie-nominatsii-v-russkom-angliyskom-nemetskom-frantsuzskom-yazykah%0A&op=translate
In Russian "to throw up" sounds like "rygat' ". So the story and the usage looks plausible (especially for some of Sant Petersburg folks).