Cautious use would include:I could be missing something, but this seems like a disaster waiting to happen. If that metal plate comes free with a lot of tension while pulling, it's going to fling back at a high rate of speed and be a flying metal projectile aimed right at the front of the vehicle.
1. Make sure you're staking it into firm ground. No mud, sand, etc.
2. Use a well-weighted winch damper on the line
3. Have your spotter position themselves in a safe place close enough to where it's staked so they can raise a signal the second the see any movement of the plate against the ground.
Plus ratled's comment on the direction of staking.