"Power theft" was my first thought, but ...
Two lines coming from one direction, and the third from another? There's something very wrong going on here. I doubt the connections to the PoCo wires were made by a linesman, even though it does look like crimp connections were made. I'll bet there was no permit on a service change.
By all means, drop a dime- to both city and PoCo. Better yet, e-mail them with this pic- I'll bet it gets their attention.
