Ideally you would tip it a 1/2 inch and butt cut it down to length as others have mentioned, however since it's an adjustable hosel and you can just screw it in I would say try it at the range first and see. Then you can decide if you need to tip and or butt cut it down, but you might as well try the simplest thing first.
I would imagine after all the social distancing, it would feel a bit awkward sitting next to a person that is not from the same household.
Just another thing we will have to re-acclimate when the restrictions are rescinded.
As for sharing a cart, while it's true there is airflow when the cart is moving, I would be hesitant share with a stranger or even a buddy for now. There are times when you are sitting and the cart is not moving. Without a divider, I would not share a cart just yet.