[Badger Nadgers]

On the lifting-off business, I prefer to reverse the top hinge so the pin points downwards.  They can't lift it off then.  Folk around here weld washers to the tops of the pins too in order to disuade the two-legged animals "lifting" the gate, although if the hangers are bolt-through rather than hammer-in then there's nothing to stop them going that route unless you want to glue the bolt and not have any possibility of adjusting it in future.

[Rupert the bear]

On the lifting-off business, I prefer to reverse the top hinge so the pin points downwards.  They can't lift it off then.  Folk around here weld washers to the tops of the pins too in order to disuade the two-legged animals "lifting" the gate, although if the hangers are bolt-through rather than hammer-in then there's nothing to stop them going that route unless you want to glue the bolt and not have any possibility of adjusting it in future.

Centre punch to the thread to distort it