Meanwhile, why and how would they know who "saagarjha"is and whether they're an expert? Are they supposed to be famous, I mean Carmack or Lattner famous no "they are known in some circles".

Even if they visit their blog, they can just see: "Hi, I'm Saagar Jha. I'm a software engineer from Cupertino, California, but I spend an inordinate amount of time in the southern part of the state" and a list of smaller projects and experiments.