Which IP blacklists/whitelists would you recommend for click fraud detection? Have you found a correlation between email blacklists (IP addresses) and IP addresses used in click fraud? Which lists do you use to detect anonymous proxy servers? Or corporate proxies? For now, we are developping our own clustering algorithms to classify IP blocks.
There's a lot of stuff on Wikipedia about blacklists (spam related), included blacklisted domains. Do you find these lists to contain a high proportion of false positives and/or be outdated?