I think they, or at least samsungs. will happily use open wifi if they can find it.
Source, my open test network and a neighbors tv that keeps trying to phone home with it.
I'm curious about that neighbor TV, do you have a model name or something if one would like to reproduce?
The TV can happily connect to my neighbors printer WLAN. That is the only open wifi around. It isn’t 2008 anymore.