I'm surprised we haven't heard more about the increasing difficulty of rooting Android phones. On an open platform I would expect this option to exist in the Settings menu somewhere maybe with a warning that it might void your warranty or crash your phone. I don't think people should be advocating Android as a free/open alternative until this situation is resolved. It's very misleading.
It doesn't really matter much that Flash has vulnerabilities, being the #1 google result for facebook login, or a fake login, or a scam email, or a fake app is more than enough to exploit people.