One of the other ones I came across a few months back was when I was reading the Terms and Conditions for a cruise I was going on. It sometimes arises people need to alter the booking, so there are clauses for this.   Here it the one that caught my eye:

If a Guest wishes to transfer to another Package, this will generally be treated as a cancellation under clause 38. P&O Cruises will allow the transfer without treating it as a cancellation if the P&O Cruises holiday to which the transfer is to be made departs within 12 months (within 6 months in the case of transfer from a World Cruise, Classic Southern
Hemisphere Journey, Grand Tour or Exotic Fly-cruise) of the original and is for a higher price.

Hang on: 6 months for a world cruise? (Not that my cruise was a world one, but the incongruity leapt out at me)

World cruises run annually in January, so a higher price alternative within 6 months does not exist. And why are they harder on world cruises than anything else? To me, it has a whiff that they originally wrote 36 months, a typo has been introduced and they have run with this absurd rule ever since, probably for decades.