Unfortunately, I can't share the contact link that Google sent because they won't let me display it here. What's the sense of having a help forum if one can't utilize the tools to help others find answers. They want to prevent spam or make it impossible to help other members?
My web host was recently was sandboxed by adsense. I had been noticing back in the spring that my webhost was constantly turning up on google search with a THIS SITE MAY HARM YOUR COMPUTER warning next to it. Some bad people were doing bad things with a site or what have you they had hosted with my webhost. I had been offline for a while trying to obtain a new system. My old computer finally konked out. I went offline around late September. Just fully got back online as of late last week. Come to find out my entire sites adsense ads banners and links, had vanished. I thought it was a glitch. So I put my webhosts site into the adsense sandbox tool and lo and behold no ads were shown. Meaning google had apparently had enough of them not kicking the malicious users off their service. I never got a personal email from adsense about anything, and my ads are still showing on my websites vbulletin forum so my account is in good standing. Anyways, I hit up the adsense forum and they told me the same thing. My host had been sandboxed for some sort of violation. I have a lot of pages hosted with my current webhost, so rather than move I need to get a new domain and point that domain to my current webhosts IP. So my ads can start appearing again.
Good News! Google has re-enabled my account. Short of pre-approving content on a platform wide basis which would take an army of man hours, perhaps Google can lend me it's web crawl software so I can detect and delete innocuous content before it goes public.