The photo of Excalibur which is shown on his blog is very sharp and seems to be high quality--the average tourist takes "junk" photos. Perhaps the "real" reason is that they fear he will sell his photos and take away business from the photos of the property that they sell in various venues.
PS: I've stayed at Excalibur twice, and the last time I had a very bad experience--if he were never to set foot in that casino he would not be missing much.