It was irresistible to ask my friend to climb into this hole and poke around given the spray painted words he didn't see -
How about posing yourself through the broken window or tattered fabrics, or better yet, let your shadow cast on the floor, a sort of present day ghost.
Simple pose if one had a house around them, but with only a doorway remaining, isn't it ironic, don't ya think?
Graffiti art is sometimes a breathtaking thing when added to textures, cracks, and slivers of sunlight.
The only thing remaining in a bare room -
Posing youself in the environment: Consider walking through a puddle in the room and leaving wet prints in the empty room. Consider having someone photograph you from behind as as you stand in the doorway and cast a long shadow on the floor. Gaze out of a broken window in profile.
Objects: Utilize the objects in an abandoned site. Sometimes, simply moving something to a new spot gives a completely different message, like a chair facing the corner, a book opened and turned upside down on a table, or a bird cage with the door wide open.