Article 8 of the official Laws of Chess reads: "In the course of play each player is required to record his own moves and those of his opponent in the correct manner, move after move, as clearly and legibly as possible, in the algebraic notation (Appendix E), on the ‘scoresheet’ prescribed for the competition. It is forbidden to write the moves in advance, unless the player is claiming a draw according to Article 9.2 or 9.3 [my emphasis]."
I don't know about you but I've always had a problem with that last bolded bit. Of course, I follow the rule, but prior to its introduction my method was to first write down a move before actually playing it. And yes, many a times back then I would re-examine the position, thought for a little more, then changed what I wrote. It is apparently exactly this kind of behaviour that the rule is designed to prevent for, as some would say, it's tantamount to cheating.
If it's a product of my own thinking process, how in the hec is it cheating? Honestly, it's a total joke.
Look - if there's one behaviour that we ought to stop, it's being able to walk around during your game. Forget the next move or correct plan in a Sicilian Najdorf? Problem solved: just look for a board with a similar opening. If that's not cheating, I don't know what is.
I predict that a couple of years from now, this will be next brilliant idea by FIDE. And they can thank me for it too.