Been mining for months, never a word and I'm not expecting any either especially since I've been living here for years. What's funny is electric use from my actual bitcoin machines is not even the bulk of my electric use. Like I said before (since Angelus has so kindly commented on the same thing from earlier forum posts), I have plenty of other machines at my home which are using more electric then my bitcoin boxes. I've had to kill-o-watt them out to make sure my circuits are safe and balanced to prevent them from tripping. And those have been running 24/7 for years, again without problems and even approval from the only people who care.
But the answer to your question, I guess someone is paying. Do you live in the US and pay taxes? Then I want to thank you for your continuing (indirectly) support of my electrical use.