Our gates are mostly hung like Fordtractor, with hinge pin 90 degrees on the post, from the straight across gate opening. That lets me fold gate back flat against the brace posts to FASTEN gate open. I had to have my fence installer take out the gate hinge pins from straight across, redrill the hinge bolts hole to get the gates off-set the way I wanted.
CUT OFF any extra hinge bolt ends not needed past the nut holding bolt in place. Extended bolt ends are STRONG, sharp, good way to let a horse cut himself or impale himself on the part sticking out. In most cases the bolt end is lined up with fence wire, not an issue. But with oft-set hinge pins, the bolt end sticks out into field where horse swings around the post or fence to get thru the gate hole.
There is no place here, where gate is not fastened open OR shut. Swinging gates make them sag, can close unexpectedly to separate animals in a group. Animals separated get VERY excited, sometimes might try going thru a fence or gate that appears closed to damage themselves.
We have these off-set hinges from barnyard to pasture, because there are more than one gate opening to exit. I close one pasture gate, open and tie back another pasture gate to change grazing. Everyone one goes into a barnyard, then into a field which is open to them.
If they are “wild horses” that day, I can close all the pasture gates, contain horses in the barnyard to bring them in.
I never leave that open gate end to snag a horse, get hit by running horses, trap one while the others leave him behind. That gate end is not real visible to horse running straight at it or a tractor either! Really stupid, bad accidents happen if you leave gates open, but do not fasten them open with a chain and snap.
Having gates properly fastened, open or closed is PREVENTING a problem from ever happening. Not bothering to fasten the gate in place, will cause a problem some where down the road. Your choice.