Technowatermelon. Elder Millenial. Building Farcaster. 

nf.td/varun

It's not always intuitive what the best signals are. 

When I worked on fraud at Coinbase - which is a similar problem - one of our best signals was screen resolution. It turned out that fraudsters used a virtual machine that had a very odd screen resolution that most normal computers would never have. 

We've found this to be true in Farcaster data as well. I'm going to be more cagey about what the actual signals are, because revealing them will cause spammers to change their behavior making them harder to detect.