Time is a limited resource, so it makes sense to at least have some type of filter. Beyond that, I found this article to irritate me and to be complete shit. You NEVER know who someone is or even will be. Jobs and Woz were a bunch of weird hippies and Zuck was a college kid who came up with a new idea every few weeks. Keep your door open and always take the time to give some advice to those who ask for it. Karma can be a bitch, but it can also be a blessing. You never know when you'll need help.
On top of it, blog as much smart shit as you can. It will spread and odds are it will impact someone's life. A month ago or so, someone emailed me with the subject: You don't know me, but thank you. He read my article on email newsletters, and it was finally the push he needed to leave his job + start his first startup. He's doing really well so far. I'm by no means popular at all. I can't imagine the impact guys like PG have had, but it has to be tremendous. We need to keep spreading our ideas and encouraging people. Selflessness and the goal to see more entrepreneurs succeed is why our industry wins. We all started from nothing, never ever forget that.
Long live Rajeev's rule.