At least they let customers to opt-out. In Malta (EU) there is an ISP called Melita - pretty much a monopoly - which enforced similar to all it's customers without even informing them and without letting them to turn it off.

It's an outrageous practice to enable radio-emitting devices in customer's homes without their consent. Unfortunately, they didn't see any backlash from the customer base, as most didn't understand what happened and believed to what lies ISP published on their FAQ page - that additional WiFi spot doesn't emit extra EMF and doesn't consume extra electicity...

I had to go to the lengths of reversing modem firmware looking for exploits in order to disable this.