Widevine (or any other DRM-based "proof of human" solution) would be far less compute-freedom and privacy respecting than a captcha. Hashcash[1] was invented t

Widevine (or any other DRM-based "proof of human" solution) would be far less compute-freedom and privacy respecting than a captcha. Hashcash[1] was invented two and a half decades ago and is still the best solution. It doesn't require manual work or user privacy invasion and deters mass spammers. [1] https://en.m.wikipedia.org/wiki/Hashcash https://en.m.wikipedia.org/wiki/Hashcash