The hooks, at least on a Gen I, are not attached to the bumper, per se, but are attached to the frame. I wouldn't worry about that coming loose. I want to put a shackle on the rear loop on mine, too, because running the strap through there is a pain in the rear. I'd remove it for daily driving, though, as it would slap around over bumps and make a heck of a racket.

John B.

'87 Raider 2.6 Turbo Auto, Under Construction
'95 Montero SR, 35x12.5/15 BFG M/T KM-2's, Rock sliders, Qtr panel chop, gas tank lift, 2" BL, Aisins, 5.29s
'95 Pajero Mini
'98 Montero Winter Ed.
'04 Cadillac XLR
'03 Kawasaki ZRX1200R
'60 Ford Falcon 4Dr