I see no attempt at diagnosis as yet. My posts (John can speak for himself of course)are simply honest responses to unique posts from 'no author'.
As for the whole thing being a game does not mean really anything. My responses would be the same. If it is a colleague my response would be the same (therapists are human too).
What is important is who ever is crossing the line to post 'empty' messages might as well add a few words. I would be interested in what for that person could be full of more meaning then we (at this point) can imagine.
Like Jesus said:
'For the poor to give has more value than for the rich to give'
Not His exact words, but still the meaning.
Regards,