I second what Fenris said.
As you say, if you sure have checked the game daily, or atleast a lot, you do know that they are often there quite a lot.
And you do know that moderators moderate the in-game as well.
meaning, if they were upto anything illegal, they do be banned by now.
then better not mention vivi to him
i wonder what the hell he'll think/feel after seeing all these threads and his fame in-game and forum wise, sorta :d
on the other hand, guys, just let them be. they decided to stay privately so let them.
if they wanted you in there, they'll whisper to you the pass or /fenter you or something. End of story