Let me ask you this then. If someone argued that we should just get rid of and have no laws in general because criminals will obviously still continue to break the law, would you agree with them? If it's a no, then this case is the same
For starters let me address this nonsensical argument. ( Criminal justice major btw so i know a thing or two about the law and why we have them. ) first things first, comparing draconian policy to a online debating website meant to debate over fictional characters is completely asinine. There's a very big difference between real life laws and wiki rules. You could argue that they have a similar basis but the two are completely different and cannot compare the two. Now, let me answer your question with another question, if i were to propose a law that states that arguing with strangers online is now punishable by time behind bars, do you believe such a law would be passed? The answer is obviously gonna be now, as that would be ridiculous, irrational and a complete and total waste of time. this again is making a mountain out of a mole hill while also over making a massive over generalization of two enitre fandoms. The issue isn't the fandoms, the issue stems from the users. I.E, a thread doesn't need to be for Bleach vs Naruto to go to shit, it could be something as simple as a thread regarding mind hax or soul manipulation and then Bleach or Naruto gets brought up. Obviously we aren't going to create a rule which bans even the mentioning of the two franchises in the same thread, that would be extremely hard to manage and it wouldn't succeed. Long story short, your comparison between actual laws and wiki rules is the perfect example of a false Equivalency and cannot compare to each other.
People will of course always break rules, but that doesnt mean we purposely just take a back seat and watch the chips fall where they may. We do everything in our power to prevent the chips from falling through the cracks. Some will get through, while most wont. We wont stop every single person from breaking rules obviously, but as long as we stop as many as possible, that is doing our job. Banning topics again isnt because it's a waste of time, we ban them because we have justified reasoning to ban them. And if the 2 fanbases should try and keep themselves apart, why can't we ban the topic then? What harm comes in doing that when no matter which way you slice it, it will ensure that neither fanbase interacts with the other? Thats what im not understanding.
Again, this is making a massive mountain out of a mole hill. Your attempting to push for a rule that would blow things way out of proportion, waste everyone's time writing it, enforcing it and having to Constantly monitor threads for no reason. Something like this wouldn't even work even if we assumed it was a legitimate reason. So far your arguments for wanting to ban these types of threads haven't been valid as you've been using massive over generalization, an appeal to Extremely and also reaching into the territory of slippery slopes Fallacies. Again, the two fandoms could simply just not interact with one another, there's no point in enforcing a wiki rule over such a minor issue when compared to other issues in the wiki.