So... If PoW (proof-of-work) schemes like Anubis ultimately don't' work in practise, because Bots/Crawlers are increasingly using headless browsers, are able to solve captures, proofs, etc; What options do we have realistically to filter out or block unwanted traffic? What clever schemes can we...
Source: [Hacker News](https://news.ycombinator.com/item?id=49054859)