It took 12 years for Felicity McVay’s daughter Milly to grow into a confident, gung-ho and outgoing kid. It took six months, finely honed social media algorithms and a map on Snapchat for it to come undone.

Milly was in the final months of year six in 2022, and a group of friends had said they weren’t doing anything over the weekend. “Then she showed me on a Snap Map that they were all together at some sort of party,” McVay says. “It was heartbreaking. I just felt devastated for her. She was just so confused. She felt alone.”