Stupid and disappointing. Wikipedia and others should move decisively away from using IP addresses as any form of unique ID and address the actual problem in a way that still preserves the option for useful pseudonymity and participation. The basic issue with moderation is the balance between the time/resource cost of moderation and the time/resource cost of evading it times the quantity of bad actor interest. Like i…
1. Defenders use standard PCs and mobile phones. Attackers use GPUs, FPGAs and ASIC and run them in places where electricity is cheap.
For traditional hash algorithms this gives the attacker a thousandfold or so advantage. There has been some work on closing the gap in the context of crypto currencies, but I don't know how close they got.
2. It takes a phone (or even a PC) a long time to burn through $2.
3. Attackers have large botnets and don't pay for the electricity consumed by these.