Seeking Google reverse DNS delegation contact

Does anyone here happen to know who at Google I should be talking to if I want to ask a question about their reverse DNS services? I'd just like to ask someone there why anyone at Google thought that it would be a Good Idea for Google to provide reverse DNS services for the 204.8.136.0/21 IP address block, a block that appears to be chock-full to the brim of snowshoe spamming domains. http://pastebin.com/raw/VNwmgMHh http://pastebin.com/raw/Hk3SKGvp P.S. I gave up on the "evil" part some time ago. Now, I'm willing to settle for them just not being spammish.