I had PM'd him a while back with my concern. Got a reply the next day. He's fine. He still lurks - anonymously. Not going to say more without his permission.
FWIW, I've left quite a few over the years -- one of my favorite car forums over the bickering, name calling, and immaturity of some of the postings. Another forum - well, they changed ownership and it was NOT for the good of the forum so I quit going there. Yet another had too many 'know-it-alls'...