There are a number of players out there who either purposefully mis-calibrate their headsets, or sit / lay on the floor IRL so their avatar's body is in the ground and only the head / hands are visible.
This is a major annoyance as it gives these players a big advantage as they are much harder to hit.
In competitive games such as Paintball, Laser Tag and Rec Royale it would be useful if there were a "minimum height" that it forced your player to be above the ground to prevent this form of exploiting.