I didn't work on GAE, but I know a fair amount about how it ran and, as I read, too, I could think of quite a few things I would have done, had I been a malicio

I didn't work on GAE, but I know a fair amount about how it ran and, as I read, too, I could think of quite a few things I would have done, had I been a malicious actor. Denial of service is the first to come to mind. I'm sure a real security person could do a lot more.