Opposite Phases in Single Phase Pad mounts

[hotwiretamer]

Our company is wanting to change a URD loop around (a very large and critical one) to handle load balance problems. The linecrews are telling them there is other ways with the Overhead to balance load.
They are wanting to have opposite phases in single phase pad mounts and we are telling them it is a hazard.
Anybody out there have some accidents, or incidents that we can use to fight this thought process?