He's privately answered my message this morning (in which I asked about what was actually in the place the figure is...and then said scrap that, I've just realised you've already shown me in one of the other pictures. I remarked it was, therefore, astonishing.):
"well as astonishing or as unastonishing as the picture may be, im moving out of that house on sunday, im staying at my mums at the moment as i just dont like it there. Not because of that picture, but because of the doors unlocking. It doesnt feel safe anymore."
I think in the end that's as much information as we can ever get on the picture. The overriding sense is that he's not setting out to promote it to the world at large or use it as "proof", but that its mere additional potential corroboration for him personally of his experiences of strange happenings with doors and locks, which have unsettled him.
Everything reported here can only be accepted or rejected on trust and personal gut feeling as to how sincere he is or isn't.