(This post was typed on Emacs, an open source text editor, 
  and I’m already gathering awkward looks from the people. 
  “A strangely dressed man typing away furiously into a black 
  screen with green text. He’s got to be a hacker!”)

More likely people are thinking "Why is he using Emacs when he could be using VIM!?". Or maybe they're asking why he's writing a blog entry on an OS like Emacs when it doesn't have a good text editor.

Seriously though, most of the software I use is open source and is often more user friendly than commercial alternatives. So I disagree pretty strongly.