[FM: Deterrence is a valid passive defensive strategy. Defense is an active response to a threat.]
At this time I'd ask you for a source of "definition" that requires "passive" or "active response" but I know that would be a waste of time.  I'll point out your idiocy and expect further idiocy to defend this idiocy.
Pitfall traps are not a form of defense?  A moat which has been used for thousands of years by multiple nations around the world is not a form defense?  Modern technologies like online PIN numbers to prevent unauthorized access are not a form defense?
Everyone else in the world throughout history have recognized "passive" forms of defense not to mention put them into practice but that's not good enough for you.