If the bottom hinge is in the same orientation as that top 1 they will just lift the gate of the hinges.
Use coach bolt & nylock.
Eye have 3 hinges on each door. The middle one is in the opposite direction to stop the door being lifted oft. The posts are on the outside of the garage so eye can't get to the other side of the post to put a bolt on, if using bolts on the posts. Hence thinking of damaging the screw heads.
 
I've done this in the past to protect an anchor point for locking pushbikes to.
Won't deter a determined crook..
Yer can't stop fings being taken but yer can make it more difficult.and time consuming. House down the road had the fence at the back unscrewed so they could get in. Something must have put them oft as that's all they did. It was put back with nails from both sides to make it more difficult.
 
Remember I posted about a Maggie statue in Grantham. Well a local artist in an attempt to save the council £300k has commissioned this...
D114D6A9-60E8-4227-9600-D1110B226FD3.jpeg
 

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