Hackers have previously targeted PCs, smartphones and even smart devices like fridges and kettles, and now they're targeting smart TVs, too.
Luckily, LG stepped in and allowed a factory reset, but only when the affected user had asked for it to be enabled.
On Christmas Day, software engineer Darren Cauthon complained on Twitter that a family member's LG smart TV had been infected by ransomware while trying to download a film. A fake FBI warning appeared on screen, demanding a $500 (£400) payment.
The letter claimed that "suspicious files" had been found on the device, and that the user's "attendance of the forbidden pornographic sites has been fixed". It went on to say the set had been locked, and that their "location and snapshots containing your face have been uploaded to the FBI Cybercrime Department Datacentre."
It was nonsense, obviously. Cauthon complained that LG hadn't released the factory reset method for the three-year-old set, and so the attack had left the TV unusable.
The Korean company eventually complied, but only after a couple of days and thousands of retweets.
Still, it goes to show that any device connected to the internet isn't safe. Oh, and careful where you download films from...