FWIW, it was never pseudonymous or anonymous. You could retrieve persistent identifiers for everyone, including phone numbers, GPS, etc. if you sniffed the request. They logged everything, verified non-VoIP numbers, and all.
Reboot it if you have conviction, times have changed, and will change. I still have ideas that absolutely no one believes in and hasn’t been solved for over a decade now. Who the fuck knows? Reboot Yik Yak.
The bullying issue would be 100x times worse today.