There is a standard type of JW troll that posts a lot on ex-JW boards.
They are single, lonely, nutty, and are social rejects at their own kingdom hall as fruitcakes that even the JWs wish wouldn't attend THEIR hall. You've seen them at your halls when you were JWs. They were shunned socially almost as much as someone with the disfellowshipping label. They were considered an embarassment by most of the JWs.
You Know fits into this category, I'm sure. Of course, he has to bring some self-importance to his lonely life. So in his demented mind he is a special person who "battles" the evil ex-JW apostates. But it's a hapless and unrewarding fantasy. It's not one he can share with his supposed brothers and sisters at the kingdom hall. They would think he is nuttier than they already do. Even your average Jehovah's Witness is smarter than You Know, and won't waste time trying to change someone's mind who isn't listening.
Also, no one on the Ex-JW side of the fence buys into his foolish blatherings and rantings. Of course, You Know is always HYPING some catastrophy. But what he's really trying to do is draw some attention to *himself." It's an ego thing, but there's not much of his battered ego left anymore. The best that You Know can get here is pity from some who recognize he has got some serious emotional problems. But for someone who is as lonely a soul as him, any attention, even antagonistic attention, is better than being completely ignored by people in general.
As a JW, I never had time to troll around ranting and raving to ex-JWs. Being a JW is like having another part-time job. And if you have any position like being a MS or an elder, you don't have time for extraneous activities like being the local JW buffoon on an ex-JW board. But You Know certainly has plenty of time. Why? Because he doesn't have a position of responsibility in the congregation. Maybe we don't give the JWs as much credit as they deserve.
So you can expect You Know to continue on with his rants. But don't believe for one second it has a thing to do with bringing anyone back into the JWs. It's all about him. And that's sad.