Is it possible that if you flag an add too many times with blacklisted proxies that Craigslist will "lock" the ad and make it impossible to remove? I have a particular ad I'm trying to remove and I flagged it about 70 times with unique US IPs. It was still up so I tried using a local computer and renewing the IP address (the last 2 numbers would change each time) and sent about 30 flags. It's still up. I thought the local IPs would be unique enough to do the job. I'm wondering if the proxy IPs were blacklisted and CL noticed something was going on so marked the ad as legitimate or something.