So you're suggesting that competitors need to videotape their own solves, then review the tape, if they don't want their judge to negatively affect their results by breaking WCA regulations?
Well, for quite a lot of people- and basically anyone attempting records- videotaping is already done. If you have the tape, you can watch it if you think there was something wrong (hindsight!). What we have is an imperfect system, and there isn't anything easy that can fix all the potential issues.
Would you mind suggesting a few that don't result in the judge being punished in any way?
We've already seen one story of a +2 where the judge moved the cube before the competitor could file a complaint. The judge could also just as easily give
less inspection time, by giving the warnings earlier. Heck, any time the competitor even
approaches 15 seconds, the judge could just add a +2, since no one else can see the stopwatch. Not to mention, the delegate is more likely to take the side of the judge in any dispute, since he is assumed to be impartial, which the competitor cannot be. This "scheme" that you've hatched relies on the competitor uploading the video (or someone else uploading it) with the entire inspection so that a solve which would be otherwise entered into the books with no problem can be viewed and analyzed by the community and the penalty enforced after the fact. Despite the fact that it seems to have happened here (pending WCA board decision), it isn't exactly a reliable way to sabotage someone.
So do I have every one of my solves videotaped to protect against evil judges? Heck no! I'm not breaking any records, and no one wants to watch my crappy solves on YouTube, anyway. Not only that, but I have a pretty optimistic view of humanity. I trust my judges much more than the previous paragraph might suggest. If I'm suggesting that you tape your solves to document potential incidents, it's to protect yourself against accidental, absent-minded mistakes, which seems to be what happened here. It sucks, but the regulations are clear.