Sorry but I dont follow. I hope you can clarify. What's the disadvantage for providing a PTR -> sfo07-blah.google.com instead of sfo07-blah.1e100.net? Browse

Sorry but I dont follow. I hope you can clarify. What's the disadvantage for providing a PTR -> sfo07-blah.google.com instead of sfo07-blah.1e100.net? Browser will send cookies to X.google.com and it will not to X.1e100.net. Ok. But how is that problematic in this case? Why will X.google.com misbehave when it recieves google's cookies? Why will it be online in the first place if it is not yet up to apropiate security standards?