Guess I'm naïve & behind the times (I don't find time to consume the legal free material I want to watch in the UK), and they may be everywhere, but I was suprised to see one at a family member's house, bought it 'from a guy'. They were genuinely surprised when I told them that it was illegal to use (yes, I didn't expect them to be that naïve either), and that it was torrenting (therefore they were sharing material), so they might expect a notice from their ISP at the least.
It was a modded Amazon fire TV stick, extremely easy to use. As somebody who hasn't seen TAFKAXMBC for a few years it has gave a very impressive UX, and the legal apps were much better than my chromecast legal apps and (admittedly couple of years old) smart Blu-ray box. The film they put on (Nice Guys) also helped with my Spanish, due to the burnt-in subtitles, but the media companies are going to have a real problem fighting this out-of-the-box easy entrance to illegal sharing.