And lo, it came about, that on Fri, 12 Sep 2003 23:22:46 -0700 in rec.crafts.metalworking , Jon Anderson was inspired to utter:
Remember, those are "tamper resistant." Like locks, they keep out the honest and the lazy. (I also remember seeing some bolts with a head which sheared off when set. Really are "Just tighten it up till it breaks off, then back off a quarter turn")
You've got two basic sort of thieves: those who will try and finesse their way in (they buy all the "tamper resistant" drivers, etc.), and those who figure they can break in, grab the stuff and be gone before the cops arrive.
Given time, security fasteners aren't a problem. even the headless ones will grind off :-) Or I can always hook a cable from the grill to the back of a vehicle and just pull them off. Okay, I may need to get a bigger truck ...
toodles pyotr