Sarah Jamie Lewis's work on privacy has been massively influential on the work I'm trying to do. I also highly recommend checking out her Oniondildonics post about metadata obfuscation in anonymous teledildonics interactions:

https://mascherari.press/oniondildonics/

She's now running the Open Privacy project, which is doing great work on general anonymized communication:

https://openprivacy.ca

That was awesome. Security is often an afterthought for many companies. Anyway, it's good that they fixed it in the end.