How exactly do you lose your domain by violating a terms of service? Does Craigslist file a complaint with ICANN or something? I can see a lawsuit and prohibition against accessing their service.
I don't know how open Craigslist is, but reading things like "you have to write a script that can scrape Craigslist" and "build a bot that visits Craigslist", all I kept thinking was : "violation of terms of service".