If the vice is pretty tight you ll have no issues bending this fork.
Diy door lock from outside.
You can take it on trips to use in motels or use at home public bathrooms etc.
The next step is to cut off the handle of the fork with a metal saw or something else that is able to cut through the material.
This is a video on how to make a portable door lock.
A brilliant yet simple technique to lock the door from outside without disturbing or asking your friend to lock the door.