Horsecock does, in my opinion, post a good variety of pics, and not of just of people that he's cool with. He does post a lot of the Nmph/Aquas, but those are the guys who are painting the most right now. But he does post a lot of quality graff, and a lot of graff that is in the streets is not necessarily quality graff.
Also, I'll speak for myself, and maybe some others, I don't go around flicking graff like I used to. I usually only flick my shit, and the people who I painted with or paint with. Occasionally, I'll see something and if I'm out toting the camera, I'll flick it. But I don't go to any significant effort to flick graff, especially random graff.