That won’t stop it though. Not at all. There are some very dedicated people who enjoy being non-constructive and others who enjoy concern trolling. They know exactly what they are doing.
People also take the bait. We have a couple of people who use multiple accounts to do it. They are even worse on the WoW forums where you can have hundreds of characters per license and each is treated as a separate forum account. Working to get that changed so it at least limits it to one posting identity per Battletag. It won’t stop it, but it helps.
That is what he does. Along with personal slights, misinformation, etc. It is an attempt to get people to engage because people tend to defend themselves, and also to correct things that are wrong.
Moderation is poor and inconstant. However we do have ignore lists and there is a way to prevent the concern troll threads from showing if you use a browser addon.
Not sure if this still works, but worth a try. It should even remove their threads from your view.