I talked about this to Mys-san, a chat room mod, Mys-san also suspects he is 月宮あゆ.
Are you able to check his IP by his chat user name?
So far, although he didn't make BIG troubles yet on the chat room, I'm afraid it will be a trouble soon or later.
To someone who was shocked by disclosure of the chat log.
From this thread.BTW, if there is anything in the logs that you wish wasn't... send me a PM or a IM message and i will edit the logs to remove anything that shouldn't be there. i understand that some people may not have been aware that logs were being kept, and may have sent some information that should not be public/kept forever. so if there is anything you wish removed, let me know and i'll make it go *poof*.
I think he will kindly edit some logs .