There is a check box, and once you get burned you learn to look for it, but
I agree—I really hate opt-out things like that.
I know this isn't an AE post but I don't subscribe to any Flash
lists.
So, the latest Flashupdate installed MacAfee Scan Plus (or some such), and
I did not even notice an option to opt out. This is bad practice, Adobe (waggles
finger).
Brian