Late one night in April 2020, towards the start of the Covid lockdowns, Shanley Clémot McLaren was scrolling on her phone when she noticed a Snapchat post by her 16-year-old sister. “She’s basically filming herself from her bed, and she’s like: ‘Guys you shouldn’t be doing this. These fisha accounts are really not OK. Girls, please protect yourselves.’ And I’m like: ‘What is fisha?’ I was 21, but I felt old,” she says.