Probably the best thing to do against this guy is to withdraw outrage and identitarian fixation, both are what he's looking for. He'll either sperg out and make a mistake that results in legal pressure or resource loss, and or just lose interest and look elsewhere.
Alternatively, again if what I'm seeing is correct, he could just release that identities are not real, and that you don't need one.
You're assuming a basic run of the mill attention fag, which was true back in the early 2020's going back to 2016's. What we're dealing with now is something entirely different he's allowed to grow in a particular chamber to the point of egocentrics that doesn't allow for backing down. That level of "He's become the biggest fish of his pond, and has been treated as such for quite some time, to the point where he genuinely believes he can fight whales." People like that, don't stop, they don't suddenly wake up and think "Oh, all of this is pointless; or my actions are silly." When they hyper focus on something that has personally wronged them, they go all in and double down, especially when they think they can win.
Don't humanize him, he's beyond that point and while that sucks, the only way forward in dealing with it is putting the dog down, which in this case, is ripping off the mask, and purposefully and publicly dismantling him. Not because of who or what he is, because I think there's a part of him that enjoys that, but because what he has done, which is unforgivable. And no, I'm not just talking about making 4chan hell, or giving Null a massive headache, I'm talking about about the abuse of children, of which, if he weren't involved with that, and enabling it with his strudychan/owo vg side venture, most people outside of Chancentrics and Kiwicentric viewpoints really wouldn't care.
Speaking of which, interesting rumor from the grapevine in that regards, which has to do with said sturdychan/owo vg side of things; now, this is just a rumor, but I've heard that Lemur, the second in command, may have been affiliated with indiachan/bharatchan, which is an interesting history in and of itself, and involved in a very weird shell operation of hiding imageboards in otherwise seemingly normal Indian websites, including ones for churches. The content of said imageboards, were as you would imagine, CSAM, Zoosadist content, the typical stuff that these people are involved with. What is funny about this piece, is this history overlaps with a particular circle that comes into my field of relevance which is the Com/Edgesphere side of the internet, specifically in the Soysphere. Indianchan/Bharatchan, and Soyjak.in was one of the bunkers back when the sharty went down, particularly during the Clayparty/Foodist/colony days, of which, said content was the regular being openly operated in.
If the rumor is true, Lemur is the aggrivating factor here, because this is a very fucked up jeet who has been around very fucked up people for a few years now, and may explain why Leto went from extremely gay and annoying fur faggot to "I post CSAM and host CSAM to own 4chan and Kiwifarms"
You are extremely correct that Leto, Lemur, and other various members of his community, discord, and other groups read this thread, and participate in it.