Apparently the 'silent patch' dealt with Gatekeeper specs and thus applied to OS X well beyond the Lion version.
Gatekeeper is a security feature first implemented in Mac OS X 10.8 (Mountain Lion).
So most of this discussion is beside the point with respect to Mac OS X 10.7 (Lion) and earlier versions.
The point of this discussion hasn't been whether or not you were on the receiving end of
any silent updates, rather it has been that your faith that your pref has prevented such is misplaced, and that the possibility exists that you may be on the receiving end in the (admittedly unlikely) future.
You have raised a valid point, though, about your on-line habits and how they'd affect such a potentiality.
