Obviously I can't know what he acts like in reality, but I do know some of what he's done outside of TLS. He obsesses over Jessie cosplayers, he gets into even worse arguments on places like Game FAQs and FF.net than he did here, he harasses Square Enix and the remake voice actors on twitter... It's far from harmless. Saying that is just enabling him, like you said. The biggest reason I'm happy he got banned isn't even because I was sick of his rants, it's because I was sick of how you all kept indulging his behavior well beyond what was reasonable. It was clear from ages ago that TLS wasn't helping him, it was only inflaming his behavior. He got pointedly worse as time when on but decisive action wasn't taken, maybe everyone just hoped he'd stop on his own, but here we are.
Maybe the fault lies on being "too nice"? I will include myself in this, in that we were too cautious not to hurt someone's feelings, and so we didn't speak aloud what maybe many of us thought from the get go.
I tried to be nice with him at first too, mainly because he seemed like a good person and had good skills at graphic design. Plus I asked him for some advice about my own novel and he was super nice about it (Render to Caesar the things that are Caesar's, as they say). And so I added his fanfict to my FF.net favs and alerts. But then I saw the conflict he had with a reader and, honestly, I didn't even touch the fict because what he did gave me really bad vibes. It's public and you can go read it, but I'll sum it up for you: A regular reader took longer than usual to leave a review, he tried sending her a PM but she had her mail clossed for unrelated reasons. Jairus created a Deviantart account with the sole purpose or contacting her via PM. She was geniunelly spooked by this and asked him to leave her alone and never contact her again. He apologized and I don't think he ever insisted again.
So his story sat on my alerts and I received the mails each time he updated, but as of today such thing is no more. I removed him from my list and boy am I glad that I stopped my interactions with him when I did.
One thing is sure: That he threw shade over our forum, yet he's finding in other places exactly the thing he accused us of doing. Wouldn't surprise me if he got blocked from a bunch of accounts and/or banned from sites and such.
Which could escalate in an even worse condition for him. This is fucked up.