Maybe, but at the same time, when you have something that make flame wars inevitable, no moderation team can stop that. Of course, you can never rule out the chance of a flame war. If you've seen the "discussion" about Donald Trump, you can see how passion for or against him can lead to fierce anger and in the end flame wars (and it doesn't matter if Trump is good or bad, I'm just saying how the discussions go), but then again, Trump is about politics, and then you can find reasons why people are passionate, fights about something as trivial as downvoting are downright terrible for a moderator to judge (trust me, I'm experienced in these matters), as then the source of the fight is hard to pinpoint, and the fights can then easily become a fight on their own with eventually no pinpoint to what started it all. Also downvotes are also often used as a childish method to publicly embaras somebody you hate. When these are invisible, troll downvotes do decrease (what is the point if the person you hate will never find out), and as they often go unnoticed a lot of trouble is prevented. In the end it does work out for the better...