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.
I’ve often thought it would be fun to get a big group of Flat-Earthers involved in a scientific project to ‘prove’ that the Earth is flat. They’re not allowed to rely on any existing science that might be biased towards ‘Big Globe’ so they have to start from scratch using simple instruments. Using existing maps and GPS are definitely out of the question. Have them conduct cartographic surveys and take astronomical measurements so that they can show that reality is inconsistent with a round Earth. Basically, see how long you can keep them going for before their brains break.
Ooh, I have a good one. While I was asleep my brain came up with “Late’n’Baked” which was some kind of instant foodstuff for stoners along the lines of Huel. This was apparently funny enough to wake me up.