I don't. There aren't any open wifi networks anywhere near my home, though. I assume if it did that someone would have noticed by now. That's a naive assumption, but given how many people actually look for such behavior, it's not entirely out of the realm of possibility.

It could still store the data on the device. Then in the future, a companies like google could drive around with an open wifi network on their street view cars and charge TV manufacturers for gathering the data. Or drones with open wifi could be deployed.