I think this is incorrect speculation. Black&Decker, for example, sells a similar looking device. I've had one on my meter for months and no one's said anything.
The reference to specific manufacturers is for informational purposes only and does not represent that the Power Monitor has been approved or endorsed by the manufacturer or your local power company.
I will give you this one though. My local power company indicates that the meter is property of the customer. Perhaps this is more common that I initially thought:
