I was at the Grand Opening for the California Aerospace Museum yesterday. There were a lot of cameras but I was one of the official ones shooting for the museum itself.
So there was a flag ceremony, ribbon cutting, various speeches and politicians and such. My big issue was with this guy and a woman, possibly his assistant, who were doing some panorama thing. He set up his tripod and camera right in the middle of the area, ensuring it was in the way for most of the important photos. Then, in the entire ceremony, he only took 3 sets of shots. The woman with him just stood there, camera round her neck, bag on her shoulder, never once raising the camera to her eye.
I respect their need to set up there for their shots, but move your damn stuff when you aren't using it so the rest of us don't get your stuff in our shots. The two TV cameras got even more in the way but when they were done they had the decency to back out. Pity it was so crowded so I couldn't get there to ask them to move.
Oh yeah, and both of them were using Nikons. Not that it was in any way connected to them being inconsiderate and annoying.
Well maybe not. 

