In the UK we at least still have most of the residual EU consumer protection law in place, so a lot of this kind of stuff that’s common in the US would be illegal here. That said, companies still manage to innovate new ways to screw the consumer all the time.
When I saw the trailer to Shutter Island, a film about a detective trying to solve a murder at a mysterious and secluded mental institution, I immediately guessed that the twist was going to be that the detective was actually a patient the whole time. This made me decide that I didn’t need to watch it and I never looked up a plot summary so I’ve no idea if I’m right.