Yes, posing on the diving board is a great thing :-) It was certainly a thrill when I went out there. What I want to know, is are there any pictures of people posing on that sloping rock in front of and below the diving board ;-)
Man, I get nervous just seeing pics like this! There's seismic activity in Yosemite, right? And frequent displacements of large pieces of granite, right? :)
On the lower left of this picture, where it's flat, I took a photo while on my stomach and peeking my head over the edge and it is a stunning sight --- just lying there and looking straight down for about 4000'.
I personally don't feel comfortable at all around these types of ledges. If I'm climbing and have pro, it's a different mindset, otherwise way too much adrenaline gets injected into the body :)