lol... no one would be able to press a law suit for ruined e-cred. Saying that someone's spouse is or isn't what one claims them to be is not a legal issue, unless names are named, and livelihood is threatened. Essentially, unless someone was to say 'Jane Seymour does not hold a valid license to practice medicine', it's a non-issue.
I find it funny that anyone would even think they could bring it to legal proceedings. Mind you, depending how it was worded, it could be one of the many thinly veiled threats I've seen made to forum administrations in the past.... 'do something about this person, or I could name you in a law suit and cost you a lot of money'. A way of forcing the forum's hand basically. But, of course, without seeing what was said, that's a hard call to make.
I think this is just the next step in his troll, he seems to be far too fabricated.